Articles on Technology, Health, and Travel

Self etching primer vs epoxy primer of Technology

Self Nuturalizing And Can Be Directly Top Coated Without Addit.

We would like to show you a description here but the site won’t allow us.A word about self-etching primer: keep it off bare potmetal surfaces. It is corrosive and will get into the pores of potmetal and raise hell with the finish paint. Saw a 67 cv that was painted Dark Moss green with Sikkens products and self etch primer. A portion of the potmetal surfaces had lifting problems that was traced to the etch primer.DTM primers i have never felt safe using on large open areas of bare metal. Etch primers are 70s tech.imo. Epoxy all the way on Bare metal. Everyones (top companies PPG,Dupont,SW,Spies ect.) products if you use them throughout are way over priced! Best wishes Travis.No, epoxy primer is not self-etching. Epoxy primer paints and therefore cannot be used as a sealer. Epoxy primer is not a rust treatment or rust converter. It will only prevent the catalyst from being exposed to air and moisture, but it won’t treat the existing rust on your metal surface before you apply the epoxy topcoat.My understanding is the zinc provides the corrosion protection, the epoxy seals it in, then whatever your topcoat is. Correct me if i'm wrong, i've gathered that it seems to come down to: 1) etching zinc chromate (canned or not) 2) epoxy primer. 3) topcoat. vs. 1) some etching wash. 2) epoxy primer with zinc chromate. 2) topcoat.Aug 14, 2018 · In this video Scott goes over self etching primer, which will adhere to steel, stainless, aluminum and more! Buy it HERE: https://www.eastwood.com/eastwood-s...Regular primer is a high-build primer; therefore, it's good at filling up and sealing porous surfaces on substrates. Self-etching primer is a low-build primer designed to corrode/scour surfaces rather than fill pores and cracks. The regular primer is better at sealing than a self-etching primer from the above.Question is...Do I need a self etching primer before the epoxy primer...or is it as good etching it myself with muriatic acid or similar....and then epoxy prime it? 19-03-2019, 20:35 #2: stainless guy. Registered User. Join Date: May 2015. Posts: 86 Re: Etch aluminum vs self etching primer?Frequently bought together. This item: SEM 39671 VOC Black Self Etching Primer - 1 Gallon. $10823 ($0.85/Fl Oz) +. TCP Global 50 Pack of Ultra-Flow Blue Nylon Mesh Paint Strainers with 190 Micron Filter Tips - Premium Cone Screen Filters. $899 ($0.18/Count)Jan 5, 2023 · The key difference between an etch primer and a conventional primer is that while conventional primer contains resin to allow for better paint adhesion, the self-etching primer contains an additional acidic component. This allows etching primers to rough up the surface to create more surface friction.Oct 31, 2018 · Rust-Oleum 249322 Automotive Self Etching Primer Spray Paint, 12 oz, Dark Green. $7.27. Rubber Sheet Warehouse .062" (1/16") Thick x 12" inch x 12"inch -Neoprene Rubber Strip Commercial Grade 65A, Smooth Finish, Solid Rubber, Perfect for Weather Stripping, Gasket, Costume & DIY Projects. $8.00.Applying The Self-etching Primer. Self-etching primer preps metal for paint. Follow these steps: Shake the primer can well. Mix the contents fully. Test spray on cardboard. Ensure even spray pattern. Hold the can 8-12 inches from the surface. Start with a light coat. Let the first coat dry. Follow the manufacturer's recommended time.Its not recommended since the effectiveness of the epoxy will be compromised by the etch primer below. That being said, I know that ***** epoxy can be applied over etch primer. Be sure to scuff the etch primer well to provide scratches for the epoxy to bond to. The first coat of epoxy should be unreduced and personally I would apply two coats.Sep 29, 2023 · The basics of using automotive primers, acid etch primer, epoxy primer, and urethane high build primer explained, as well as basic prep work, block sanding a...Epoxy has anti-corrosion properties and some (*****) has UV inhibitors as well. Filler can be applied directly over epoxy primer and more epoxy applied over the filler to completely encase it in epoxy. Epoxy also provides some build so it can be used exclusively without any other primer/surfacer. Epoxy can be reduced 50% and used as a sealer ...Applying the Right Primer Over Self-Etching Primer: The Next Step. By Ann June 17, 2023. Self-etching primer is an adhesive that is used to prevent rust on metal surfaces or fiberglass. This type of primer is more beneficial than regular ones due to the chemical that etches on the surface. Simply, it makes the surface callous like …RAPTOR EPOXY PRIMER TECHNICAL DATA SHEET RAPTOR 4:1 ANTI-CORROSIVE EPOXY PRIMER Please note: RAPTOR 4:1 Anti-Corrosive Epoxy Primer must not be applied directly over Etch/Wash Primer. P80 Reclean after sanding with a cleaning solution like U-POL SYSTEM 20 Degreaser (UP2002) and dry thoroughly. Sa 2.5 NACE No. 2 …The job of self etch primer is to make a good surface for putting the next layer of paint on to the metal. If the metal is already a good surface for a direct to metal paint then you do not need (and do not want) an etching primer. The etch primer has been improperly thought of as a way to prevent corrosion.Search Results related to self etching primer vs epoxy primer on Search EngineOct 31, 2018 · Rust-Oleum 249322 Automotive Self Etching Primer Spray Paint, 12 oz, Dark Green. $7.27. Rubber Sheet Warehouse .062" (1/16") Thick x 12" inch x 12"inch -Neoprene Rubber Strip Commercial Grade 65A, Smooth Finish, Solid Rubber, Perfect for Weather Stripping, Gasket, Costume & DIY Projects. $8.00.Clean and prep surface then let dry thoroughly. Application: Shake can well before spraying. Spray two light coats of POR-15 Self Etch Primer and allow 10 to 15 minutes between coats. POR-15 Self Etch Primer can be topcoated in 30 minutes. It is not necessary to sand POR-15 Self Etch Primer before topcoating. It cures to touch in 30-60 minutes.The self-etching primers get through that and give a good bond to the metal. The ribs are bare aluminum and will need the protection most of all. Van's mentions a Sherwin-Williams wash primer in the front of the plans book and it worked well for me. I mix it up in a 1-2-3 ratio. The 2 and 3 parts are the Sherwin-Williams chemicals.Rust-Oleum® Self Etching Primer prepares bare metal, aluminum and fiberglass surfaces to promote maximum adhesion and smoothness of the top coat. This product is …The regular primer formula contains solvents, binders, and synthetic resins without extra additives. Its key ingredient is the binders that give primer good surface …The very thin etch primer will float off the high parts and gather into the low parts, its that thin, most etch primers, not as thin as water but pretty close. And thats NOT a flaw of the etch primers. That IS what you want for an etch primer. Its NOT meant to protect (abrasion), fill, color or do anything but prep the metal for additional ...This is also a zinc powder-based weld-thru primer. The 3M Weld Coating boasts a durable coating that is put on the dry metal materials easily due to an aerosol spray design. The gray color of the zinc powder base blends in with most materials. The drying time on this spray is around 10 to 20 minutes.16-oz. aerosol can covers about 10 sq. ft. Gallon (120-sq.-ft. coverage) for your best value! ACCESSORIES. Our Chassis Black paints do not stick well to this and other single-stage self-etching primers. This Self-Etching primer uses an aggressive solvent system to assure excellent adhesion to clean, rust-free metal.Re: self etching primer vs zinc chromate. kilowatts said: (i) Degrease with some kind of detergent and hot water, blow dry. (ii) Sand all existing paint. Sand to bare metal any chips, corrosion etc. (iii) Wash again with detergent and blow dry. (iv) Wash with 50/50 white vinegar and water, blow dry. (v) Shoot a thin coat of rattle can green ZC ...To paint over chrome plating, wash the surface, sand it, apply self-etching primer and filler, paint the chrome, and apply sealant. Wash the surface with soapy water, rinse it, and...Self Etching Primer. Part #39671. Self Etching Primer provides excellent adhesion and corrosion resistance to properly prepped steel, aluminum and stainless steel.The shelf life of epoxy primers seems to be longer too than other primers. I also like how you can keep the steel protected while you take your time doing filler work. I get the steel as straight as possible before the epoxy primer so the filler is only maybe 1/16" thick at the most though.Among the casualties of the mass tech layoffs are people who helped get their co-workers hired in the first place. Paraform, a startup that wants to change how the recruiting indus...Epoxy primer vs. etching primer. Jump to Latest Follow 3736 Views 6 Replies 5 Participants Last post by petrified.rabbit, Jun 14, 2007. OptimusGlen ...PPG Paint. I have used a system from PPG Paints on my bare, (non rusty), metal. The metal etch is a two part system. The metal etch is mixed, sprayed on and allowed to flash for about 30 minutes. The next stage is a two part epoxy "sealer" primer, that needs to be mixed, allowed to set up for 30 minutes, then sprayed over the fresh metal etch ...Most folks here in the forums use aerosol, Zinc-Chromate self etching primer on their aluminum hulls prior to paint. The procedure is fairly simple really. 1.) Sand any old, loose paint from the hull and/or get it soda blasted down to bare metal. 2.) Apply a light coat of ZC self etching primer let dry, apply another light coat of ZC primer if ...How To Use Epoxy Primer - Automotive Paint And Body Tech Tips#car #paint #howto #diy @myfriendpete In this video we will break down the elements of the use o...Primers/Sealers. Additional Product Information > Item Code Product Name SDS* TDS; ... 2.1 VOC Epoxy Primer - Grey: SDS: TDS: MP-470: 2.1 VOC Epoxy Primer - Black: SDS: TDS: MP-530: 2K HS Low VOC Urethane Primer: SDS: TDS: MP-560: 1K Self Etching Primer: SDS: TDS: MP-810: Plastic Adhesion Promoter: SDS: TDS *Can't find the SDS you need? Please ...The Transtar 2K Self-Etching Primer is a two part self-etching and passivating primer that retards the corrosion process. The primer and primer activator has an easy 1:1 mix ratio and requires no induction time before its use. This system ensures excellent protection against corrosion to galvanized steel, bare metal, hot rolled steel, fiberglass, fully cured body fillers, aluminum, and ...Self-etching primer is a type of primer that contains an acid, which chemically etches the surface of the metal. The etching process creates a rough surface that allows the primer to bond better with the metal. The acid in the self-etching primer reacts with the metal surface, creating a chemical bond that helps the primer adhere to the surface.Primers, Primer-Surfacers and Sealers; Converters; MM Toners; Hardeners; Reducers; Additives; LV650 Clearcoat; LV650 Factory Pack Colors; LV650 Infuse; LV650 Converters; ... Imperium 1K Self Etch Primer Aerosol 400 ml (589920) Page. You're currently reading page 1; Page 2; Page Next; Show. per page. Shop By ...Re: self etching primer vs zinc chromate. kilowatts said: (i) Degrease with some kind of detergent and hot water, blow dry. (ii) Sand all existing paint. Sand to bare metal any chips, corrosion etc. (iii) Wash again with detergent and blow dry. (iv) Wash with 50/50 white vinegar and water, blow dry. (v) Shoot a thin coat of rattle can green ZC ...The self Etching primer has an acid in it that will flash off when it drys but allows the primer to bond to the metal but DOESN'T seal the metal from moisture, you must go over it with a two part epoxy to seal the self etching primer. So use self etching primer to avoid acid etching and alodine but then prime over the self etching primer with ...Meaning, body shops quickly repairing daily drivers. I shot self etching primer on the trunk pan before shooting Southern Polyeurethanes epoxy primer (which is a very good primer) which caused the epoxy primer to lift. It did not adhere so i wont use it again. Epoxy primer is a DTM product, meaning Direct to Metal, that is clean not rusty.• Primer - self-etching • OEM finish & old paint work - non-reversible Note: Due to the diverse nature of plastics, always test plastic substrate for acceptable adhesion. ... Application: As a Primer (Direct to bare metal): Stir 2K Epoxy Primer Sealer thoroughly before using. Mix primer and activator components using a 1:1 ratio. NO ...YouTube messed with the audio gain so fixed and uploaded again. My apologies!!!Epoxy vs Etch primer. Do automotive primers protect against water and do they ...Epoxy primer vs. etching primer. Jump to Latest Follow 3736 Views 6 Replies 5 Participants Last post by petrified.rabbit, Jun 14, 2007. OptimusGlen ...Epoxy primer is catalyzed, and regular self-etching primer is solvent-based. Self-etching primer binds bare metal surfaces well and can be coated in a short time. Traditional prime plays a fast-forward role. On the other hand, epoxy primer can be applied to heavy coats that can be a guide coating and block sanded to eliminate minor ...Remove it. Bondo can be applied to bare metal or 2 part epoxy primer. Real, 2 part, self etching primer is not recommended under Bondo,....so I'm sure spray can stuff wouldn't be either. The protected want to be protected from the unprotected by forcing the unprotected to use the protection that didn't protect the protected in the first place.5 STAR XTREME #5414 Self-Etching Primer is a Chromate Free Metal Etching Filler that is ideal for spot/panel repairs where bare metal is present. It increases both adhesion and corrosion protection on bare substrates. It fills minor surface imperfections and may be topcoated directly for quick and easy repairs.281 posts · Joined 2009. #1 · Feb 3, 2010. I stripped most of my chevelle to metal, put on a coat of self etching primer (laquer based). Thought I was putting on epoxy primer. (rookie mistake) After I started on some body work to smooth out the weld spots. I realized it was not epoxy primer, by looking at the paint can more carefully.Which Paint Primer is Right for You? Etch Primer vs Epoxy Primer When it comes to painting, choosing… Helpful links have been provided here inRe: self etching primer vs zinc chromate. kilowatts said: Etch Primer: Substrates: Bare metal Steel

Health Tips for Impressions restaurant glendale

Etch Primers (some 2k) Self-etching primers are used.

Mar 31, 2024 · It is no longer recommended to use an etch primer under an epoxy primer because residual acid from the etch primer can interfere with the curing process of the epoxy, potentially leading to extended dry times, blistering, and adhesion failure.Epoxy primer is catalyzed, and regular self-etching primer is solvent-based. Self-etching primer binds bare metal surfaces well and can be coated in a short time. Traditional prime plays a fast-forward role. On the other hand, epoxy primer can be applied to heavy coats that can be a guide coating and block sanded to eliminate minor ...Primers, Primer-Surfacers and Sealers; Converters; MM Toners; Hardeners; Reducers; Additives; LV650 Clearcoat; LV650 Factory Pack Colors; LV650 Infuse; LV650 Converters; ... Imperium 1K Self Etch Primer Aerosol 400 ml (589920) Page. You're currently reading page 1; Page 2; Page Next; Show. per page. Shop By ...The description for the primer is. 2.1 VOC Multi-Purpose Primer ( JP355 ) JP355 is a fast-drying, two-component gray multi-purpose 2.1 VOC primer which may be used as a primer surfacer or as a wet-on-wet sealer when integrated with clearcoat. Now after blocking for the first time, Im left with spots of polyester glazing putty, OG paint, PPG ...Rinse the surface with clean water and pat it dry with a lint-free cloth. Sand the Surface: Next, lightly sand the chrome surface to create a rough texture. This will allow the self-etching primer to adhere better. Use a fine-grit sandpaper and make sure to sand evenly across the entire surface. Remove Any Rust: If there are any signs of rust ...I prefer Epoxy ,seal the metal so rust has little chance . Epoxy is not reversible; solvent or thinners will not affect it once it is cured. Self-etch is not water resistant, so any place the paint might become chipped or damaged can provide a path to the metal and cause corrosion since etch primer is no protection against moisture. 1966 convert.Let the final coat of self-etching primary sot for 2 to 4 hours and let it completely dry. Use low-grit sandpaper and gently scrub the surface to escalate the primer's effectiveness and eliminate all uneven surfaces. Wet the sandpaper and repeat the task to ensure a clean and perfectly smooth finishing surface.Research has shown that painting, drawing, and making crafts can have positive benefits for mental health. Arts and crafts can be a fun way to improve mental health and encourage s...Do you ever talk to yourself? Although it’s not always a conscious habit, most of us practice self-talk on a Do you ever talk to yourself? Although it’s not always a conscious habi...Jul 2, 2017 · SPI epoxy is specifically designed to be applied under filler, not so much for adhesion (filler sticks well to metal) but for corrosion protection. Filler and etch primer are both porous, epoxy is not, so epoxy provides a moisture barrier right at the metal where it's needed the most. Self-etch is not water resistant, so any place the paint ...Find out about new QUIKRETE FastSet and High Strength Anchoring Epoxy glues that are perfect for attaching railings, bolts, and threaded rods to concrete. Expert Advice On Improvin...PPG Paint. I have used a system from PPG Paints on my bare, (non rusty), metal. The metal etch is a two part system. The metal etch is mixed, sprayed on and allowed to flash for about 30 minutes. The next stage is a two part epoxy "sealer" primer, that needs to be mixed, allowed to set up for 30 minutes, then sprayed over the fresh metal etch ...We would like to show you a description here but the site won't allow us.epoxy is one type of primer-filler, i.e. a primer that you build up relatively thickly and sand down to get a good flat surface for the top coat. So I would say.... 1. Etch primer - 1st coat for all bare metal surfaces. 2. red oxide (or any of the alternatives) only used to coat internal box sections. 3. epoxy primer - a sandable primer-filler ...2. SEM Self Etching Primer Courtesy of Semproducts.com. To safeguard your vehicle against the relentless forces of rust, SEM Self Etching Primer emerges as a formidable player in the automotive care arena. The Composition for Superior Adhesion. SEM’s Self Etching Primer boasts a chemical formula designed for optimal adhesion to …About This Product. The BEHR PREMIUM Concrete and Masonry Bonding Primer is a high-performance, ready-to-use pre-treatment for porous concrete. This high-performance water-based primer will promote a uniform topcoat finish. Also creates a stronger adhesion between the coating and surface. Can be used on uncoated or previously coated surfaces.What I do to paint over chrome is wet sand it with 600 paper then I use epoxy primer to get a good bond to the chrome. Never had any peel yet, self etching primer I use on bare metal. 2003 1800c, custom paint done by me, Under taker front fender with a Neo fender on the back, modified retro seat, chin cowl , 200 metz, 11" progressive, chrome ...etch primer is an acid primer avoiding oxydation thus rust. Epoxy seals so oxygen cannot reach the metal, thus avoiding oxydation. I read lots of posts where people used etch primer 1st on bare metal and then epoxy over it as a sealer, but it depends on what sort of epoxy you use. In fact some epoxy primers don't need an etching one underneath.Urethane primer works wonders when used on a sealer such as epoxy primer. It fills in the dents that cause imperfections in the final finish. At the same time, when sanded down, it creates an excellent surface for paint adhesion. Urethane primer is more common among detailers who are heavily invested in aesthetics.Applying the Right Primer Over Self-Etching Primer: The Next Step. By Ann June 17, 2023. Self-etching primer is an adhesive that is used to prevent rust on metal surfaces or fiberglass. This type of primer is more beneficial than regular ones due to the chemical that etches on the surface. Simply, it makes the surface callous like …Suitable epoxy brands that can go over etch primers will often indicate this in this product information. These manufacturers often recommend taking extra steps before applying epoxy. Sanding the etch primer before putting the epoxy is a necessary step that helps the primer adhere properly. When in doubt, performing a test is a smart idea.The application process between self-etching primer and 3M Adhesive Promoter as well as between 3M Adhesive Promoter 4298 vs 3M Adhesive Promoter 06396 are completely different. Self-etching primer generally comes in an aerosol can and can cover about 12 square feet per can, although there are other options such as buying by …Acid Etch vs Self-etching Primer. Muriatic acid is used to remove chrome from a surface. Because of this, one may think that self-etching primer, since it contains acid, can also do the same job. You have to understand that even though both products are acidic, the type of acid used could be different.The regular primer formula contains solvents, binders, and synthetic resins without extra additives. Its key ingredient is the binders that give primer good surface …Functionally, self-etching primer does two things. First off, it roughs up the surface by eating into it, thus increasing the surface friction for better adherence. Secondly, the solution contains particles like resins that help the paint bind with the surface of your workpiece. Acid etching on the other hand is similar, but not quite the same ...We decided to give you some insight on where and when epoxy primer works best. Here are six instances of when to use epoxy primer for great results. 1. Over Bare, Clean Metal — Epoxy primers are amazing at sealing up bare metal and not allowing moisture or corrosion to creep in. Epoxy primer seals out the oxygen from the metal along with ...Jul 17, 2013 · epoxy is one type of primer-filRewash the piece with warm water and degreasing

Top Travel Destinations in 2024

Top Travel Destinations - The main difference between primer and epoxy pri

Two light to medium coats will do. Allow time to dry between coats. This special primer will grip to the metal and prepare you for regular primer and paint. 6. Once the self-etching primer is dry, spray two to three coats of the high-build primer over it, always allowing each coat to dry before applying another one. 7.The difference between epoxy primer and etch primer is that epoxy primer can be applied over almost anything. At the same time, etch primer contains acid and will lift if applied over several coats of paint or too wet. Epoxy primer is also more durable and resistant to corrosion than etch primer. There are many types of primers …This self-etching ceramic primer contains 15% to 25% ammonium poly fluoride as a conditioning agent to etch the ceramic surface. This acidic component would be responsible for the partial dissolution of the glassy phase of the ceramic, thus a superficial etching pattern was obtained compared with conventional hydrofluoric acid …Self-etching primers take longer to dry completely than regular primers. On average, self-etching primers need 5 hours whereas regular primers are ready to be painted within 2 hours. The time difference is because both primers are formulated differently. Moreover, the duration depends on the surface you're priming over, the temperature and ...04-15-2004 21:09:03. Report to Moderator. Re: Etching primer vs epoxy primer in reply to Tyson, 04-14-2004 20:29:45. Hi Tyson, Some prefer etch and some prefer epoxy. DuPont has historically pushed the etch primer and PPG has historically pushed the epoxy. I much prefer the epoxy for reasons previously posted.Jun 8, 2004 · Etch primer is not meant to be a one step primer or stand alone product just like epoxy it needs to be topcoated with the proper products to achieve good lasting results. Each product has its pro's and con's, if variprime wasnt a good quality product Dupont wouldnt list it for the lifetime warranty.Helpful links have been provided here in the description.Project Fast Fish: Season 2 - Episode 11It's important to note that good quality epoxy primer-sealer...Self-etching primer also provides protection to the surface it is applied to. It creates a barrier between the surface and the environment, protecting it from damage caused by exposure to moisture, UV rays, and other environmental factors. Professional-Looking Results. Using self-etching primer can also result in a more professional …Mar 22, 2022 · At the same time, etch primer contains acid and will lift if applied over several coats of paint or too wet. Epoxy primer is also more durable and resistant to corrosion than etch primer. There are many types of primers for metal surfaces. Epoxy primer is a chemical-resistant coating that improves the adhesion of paints and coatings.Once applied and dried (couple of hours) Use a 3m Scotch Brite pad to knock down any nibs and then shoot the Bare metal primer over the entire Prepped(Acetone wipe down) surface. Wait 4-8 hours for the Bare metal primer to dry then again a light buffing with the pad and then shoot the 1st coat of color.Hands down EPOXY primer. Da sand with 80 grit on bare metal for adhesion. Check your data sheets MOST epoxies do not require a metal prep. PPG is the only one that comes to mind that requires a metal prep prior to epoxy for max perfermance as their epoxy is below par IMOSelf etching primer is suitable for use on bare metal, aluminum and fiberglass surfaces. Oil based paint with Stops Rust formula provides rust resistant base coat for cars, trucks and other vehicles. Covers up to 12 sq ft, dries to the touch in 10 minutes and can be topcoated in 30 minutes. High quality spray paint ensures long lasting, durable ...Abstract. Purpose: To investigate the tensile bond strength of silane-containing universal adhesives and self-etch glass-ceramic primer to lithium disilicate glass ceramics (LS2). Materials and methods: 960 rectangular LS2 bars (7 mm x 3 mm x 9 mm, IPS e.max CAD, Ivoclar Vivadent) were manufactured and divided into 4 groups (n = 240).Acid Etch vs Self-etching Primer. Muriatic acid is used to remove chrome from a surface. Because of this, one may think that self-etching primer, since it contains acid, can also do the same job. You have to understand that even though both products are acidic, the type of acid used could be different.Do some more resaerch you will realize that epoxy is more proper and more widely used. Its the industry standard in auto body now. You'll end with a far better looking and longer lasting result. There is no problem with brushing/rolling the paint on the floor pans.1K Self Etch Primer Aerosol A fast-drying surface protectant for most metal, aluminum, and steel. 1K Primer Surfacer Grey ... Anti-corrosive epoxy primer. Plastic Primer Plastic Primer is a clear, easy to apply and fast drying adhesion promoter for bare plastic parts. Plastic Primer LV ...Jun 7, 2009 · I've done it both ways and a few I wont mention.If anything ,the bondo will suck up the epoxy and dri FASTER than the rest of the car,so I start off by putting two coats on the body work then do the whole car with two to three coats so really the body work gets 4-5 coats but then again I'll sand and block my body work all the way to 320 therefore eliminating the need for any 2k spray on bondo ...Epoxy primer is a primer containing an epoxy resin, once cured this epoxy resin helps forms a barrier coat of primer. Meaning that it helps trap and seal stuff under the primer as well as allowing the topcoat to not be cross contaminated with the chemicals of the undercoat/bodywork. Both serve a different purpose. Apply a thin, even coat of the primer over the prepared