Stacking Coatings – Since epoxy primers adhere mechanically, they will grab onto most anything that has a good texture to the surface. You can purchase spray cans of etching primer at most paint stores. More paint finishes are ruined by the application of paint over Etch Primer that is still drying than almost anything else. As a rule of thumb Self Etching Primers need another coat of primer over them to fully seal everything up long term. How to prep a car for paint. Self etching only needs to be applied to Bare Aluminum. I'd like to put a good urethane paint at least on these bumper brackets, and would like to put it over epoxy. These primers contain an acid which etches the metal to provide a strong bond. Without using an undercoat, the quality of your paint job suffers. (poly primer, that additive stuff, chassis paint, even a little Evercoat OEM Metal Glaze just in case) The frame was sanded down and sprayed with an etching primer from a spray can. The acid will actually burn or etch into the metal while embedding the zinc into the surface of the metal. Unfortunatly Bog isn't recommended over Etch primer it's doesn't havge the same adhesion properties as a 2k epoxy. You only have to sand it once. Can I paint straight over etch primer? I would skip the etching primer and just use the "normal" primer over the sanded surface then paint over that. I appreciate your responses. Primer. Self Etching Primer is a rust preventive coating that etches and primes in one coat. © 2020 Pistonheads Holdco Limited, All Rights Reserved. Once you spray your etch, let it flash for 30min, spray your sealer, then your base. You can paint with whatever you want over cold gal, you don't need to etch prime as if it was real galvanising. I was at autozone today picking up some Rust Oleum automotive primer to finish up my trunk lid. You also must make sure that the primer you're applying over it plays well with Etch primer. its one of those things where you can, but you shouldn't. Yes the self etch primer would be a good choice, If you’re going to prime out an entire fender, door, etc. Also etch is bloody dangerous, it will rip your lungs to bits if you don't wear the correct masks. Just dont leave the etch tooooooo long before you top coat over it or it becomes "DEAD" and the top coat will peel off if the etch hasnt been keyed up before hand... ALL 2 PACK PAINTS need … Its one soul purpose is to level out the surface thats it. So If you can epoxy it just make sure your metal is clean and free of dust and put the filler straight on the bare metal. All Self Etching Primers use this basic principle. Gassing Station | Bodywork & Detailing | Top of Page | What's New | My Stuff. Member. (Thats "IF" you dont have any body work under it) If you have body work, then yes, you need two to three coats of filler primer over the etch What Is a Paint Primer? A quality exterior primer will give a heavier build and therefore, if you have extreme weather wear and tear on your paint project using a great primer over paint will help cover small imperfections or cracks. Is there a … Etch Primer can be tricky. gotwood, Sep 11, 2008. no, you got it backwards. I'm painting a refurbed master cylinder and brake booster before installation. if you have it etched though and you need to go back and fix any kind of missed dings, etc, you are going to have a problem. Unfortunatly Bog isn't recommended over Etch primer it's doesn't havge the same adhesion properties as a 2k epoxy. After etch, there is no need to sand. You can prime and paint one day, then reassemble the following weekend after letting the parts sit all week. It is all about the prep work. You can choose from a wide variety of options for your paint colours. This process takes several hours and requires water, soap, a sponge, a towel, grease remover, sandpaper, self-etching primer, surface primer, body filler, paint and sealant. “Sweet, this means it can be done! Epoxy has basically taken over from etch as the base primer on bare metal and most folks prefer it. Though you can apply etching primer to cast iron using a synthetic paintbrush, because the metal is so slick, it will likely reveal subtle brush marks. So If you can epoxy it just make sure your metal is clean and free of dust and put the filler straight on the bare metal. What is the purpose of primer? The purpose of using primer is to prime the car to get it ready for paint, create a textured surface for it to adhere to. It will absorb the moisture and may cause issues down the road if it doesn’t completely evaporate before painting. I think it even states it on the etch primer can that you can spray over it within 30 mins I hope this helps Thanks Kevin Can you use a different primer? any filler or glaze product over etch … Once you’re finished sanding the polyester primer, use a urethane primer or a sealer over it. Self Etching Primer features an advanced spray system that allows you to spray at any angle, even upside down for those hard to reach areas. But a key difference with etch primer is that you need to apply your filler or bondo first directly to the metal before spraying it. Self Etching primer is a coating that is meant to be applied directly over bare metal. Self Etching primer can in fact be painted over but you need to closely follow the manufacturers application and top coat guide. You got it right, seam sealers should never be applied over bare metal. Ideal for rub throughs in primer prior to application of color and new bare metal panels. What’s stopping anyone from just applying his or her paint without primer? Choose a paint primer that is specifically made to go over a glossy surface and make sure that the primer is able to accept the new paint of your choice (usually latex). Self-etching primers contain sulfuric acid, to clean away gunk on the surface. 3. Most of the top grade primer surfacers can be the sealer as well. you'll have to get every bit of etch off in the area that needs fixing. But don't paint on the straight etch. 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. Re: Do I need to sand my Rustoleum self etch primer before painting over it? You can paint over varnished wood as long as you use the right materials and painting process. Edited by 106 gti on Sunday 7th October 15:34. red oxide is well known for its corrosion protection properties and it good straight to metal for this reason where as celly primer is just a basic primer. All information on this page is provided in good faith, whilst all information is believed to be correct Phoenix Precision Paints Ltd can accept no responsibility for incorrect information on this page. Monstercolors Metal Etch-Tech Grey Primer 400ml, Etching Primer Paint,Aluminum, Copper, Lead, Tin, Zinc, Steel, Carbon Steel, Chromium, Nickel, Cast Iron & Galvanized Metals 5.0 out of 5 … ©2017 The Eastwood Company. Over the epoxy you can do your skim coat of filler and block, then primer surfacer, or straight to primer surfacer. We are getting ready to primer and paint the car. If your in a quick hurry, just 1k prime over the etch then throw it out in the sun for an hour then flat it down and paint. Stacking Coatings – Since epoxy primers adhere mechanically, they will grab onto most anything that has a good texture to the surface. No worries. Now, You Can Paint Over Varnish. You will be anything but ready for more paint if you use a self-etching primer on the existing surface as it will likely cause the … 35-45 years ago, I either 'etched' fresh bare metal with metal prep, or sprayed bare metal with self etching primer, but back then I was usually following with a light sanding and then a lacquer primer before painting lacquer or enamel. To answer your original question more directly, YES, you can paint over a 1k etch with a 2k urethane primer/filler/surfacer. Phosphoric acid ester formula promotes paint adhesion to difficult substrates, like galvanized steel and aluminum. Thanks for the latest replies. They said if you leave it any longer than that the etch primer will be too hard and you will have to rub it back before you can paint over it. After etch, there is no need to sand. If you hurry quickly, just 1k premium on the etch and then throw it in the sun for an hour and then flatten and paint. It looks like the two-pack is reacting with the primer in small spots. Loads more dangerous than 2 pack, that will kill you over a longer period! This is particularly the case with parts of the frame or cast wheels that have been sandblasted and are in no need of further work. You can't paint directly over etch primer. If you’re using an oil-based paint only use an oil-based primer, not an acrylic one. Painting without primer deprives your project of a smooth and seamless finish. I had no need for a gallon of DP90 + gallon of Catalyst. But don't paint over straight etch. Urethane primers are a better surface for basecoats. Jeeeeeez.....If you can't burn it off with a heat lamp, don't panic, it wont drop off. It all depends where this part will need to be. Most parts need at least 2 good scrubs/washes in a degreaser. Self etching primer is not designed to aid in paint adhesion, it is designed to adhere itself to the metal. I bought the usual gaggle of stuff from a local paint supplier to paint my frame. Can You Paint Over Self Etching Primer? Self Etching Primer also gets a bad rap sometimes because it is particular about what coatings it plays nicely with and which it will cause issues with. But don't paint on the right etch. Applying an etch primer over the high build will help with paint adhesion, making sure that the paint over all of these layers will stick well and not be affected by any of the leftover gloss underneath. Always use gloves when handleing the parts. For this reason, self-etching primers are not recommended over clear coat finishes or existing paint. You can't paint directly over etch primer. Ideal for rub throughs in primer prior to application of color and new bare metal panels. The best paint to use is a water-based acrylic one. It uses a combination of acid and zinc in its formula. Profile Page. Let’s start at the beginning. As you can probably assume from the name, a paint primer is a product that goes under the first coat of paint. After etch primer, you need to spray an acrylic primer/surfacer etc. you cant put etch under filler, over is fine. Worked ok for me. Gave it another layer to grip to. Epoxy primer can be top coated with most any coating so you will immediately eliminate any worries of adhesion issues with your top coat. As I completed a section I would spray a light coat of self etch primer on the bare metal to protect it. We suggest using an Epoxy primer over the self etching primer as a barrier between the self etching primer. With the surface of your wood completely primed and prepped, a professional can now begin to paint over its surface. Alternatively, you can apply filler or primer surfacer over the epoxy to fill any minor imperfections and block flat before you paint. You can't paint directly over etch primer.You need a surfacer or other primer/sealer over it. The results are not good. If your in a quick hurry, just 1k prime over the etch then throw it out in the sun for an hour then flat it down and paint. Etch Primer can be tricky. After that, you need to clear coat it. I've painted semi gloss black spray paint directly over etching primer before without troubles. Once it's been left for a number of weeks, you can wetsand the clear with 2000 and then cut and polish. All rights reserved. You will get the benefits of the 2k product including less sink back, shorter drying time and easier sanding, but you will not get the rust prevention capacity of a 2k epoxy as a first coat over bare steel. A comfort spray tip with a … Etch primer is an old dead technology that belongs in the trash can. For aluminium and brass, use an SLS etch primer. When I used etch in the past I used to give it a light scuff to get rid of any spots, then prime over the top. For wrought iron or steel in severe conditions you can use a primer. If you choose to spray paint, avoid windy days and shake the can for at least two minutes before using it. I've painted semi gloss black spray paint directly over etching primer before without troubles. While polyester primers are great for filling, they can be porous. so adding a primer which has good anti corrosion properties on the top of self etch offers no added protection and will be more expensive i wold just use a good high build primer on top of etch. its one of those things where you can, but you shouldn't. Epoxy works pretty good over Acid etch as the epoxy does not tend to melt the etch like, say a 2k primer would, only issue will be is the etch is the weakest link but normally OK, if done this way. It discolored the primer, but it didn’t come off. 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. I tell him the trunk lid on my chevy nova. or no primer? Epoxy primer is a great foundation for your paint job if you are priming over bare metal, body filler, and even existing sanded finishes. I bought the usual gaggle of stuff from a local paint supplier to paint my frame. then sand that with 400 or 600 grit wet. Using the etching primer as a base coat for regular primer will give you nothing more than an extra coat of primer. It’s a paint intended as an undercoat that prepares numer… Yes the self etch primer would be a good choice, If you’re going to prime out an entire fender, door, etc. Over the last year I have torn down my 69 RS and sanded the paint down to the metal. another good choice would be to spray it with a two-part epoxy primer. Red oxide primer is a specially formulated coating used as a base coat for ferrous metals. If you in a hurry, just 1k prime over or etch, then throw it into the sun for an hour, placate it and paint it. adhesion and smoothness of the topcoat finish. I've used U-Pol etch primer on the bare metal and have just tried applying a coat of black two-pack onto the etch. Self Etch Primers are used over clean bare metal to provide a strong base for a top quality paint job. As a rule of thumb Self Etching Primers need another coat of primer over them to fully seal everything up long term. Staff member. When I cleaned up my bumper brackets 2 or 3 years ago, I sprayed them with 'spray bomb' self etching primer to protect them temporarily until I was ready to paint them finally without having any idea how I'd over coat them. To finish up my trunk lid on my chevy nova, it is to!, seam sealers should never be applied to bare aluminum weekend after letting the parts sit all week an primer... 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Finished sanding the polyester primer, not an acrylic primer/surfacer etc the quality of wood...: 16,548, it wont drop off surface then paint over it to.! Your project of a smooth and seamless finish uses a combination of acid and zinc in its formula application. 26, 2004 Posts: 16,548 it looks like the two-pack is reacting with the you! Protect it the product you apply block sand, apply more til straight... ( Direct to metal ), which eliminates the need for a number of weeks, you need surfacer... Long term for aluminium and brass, use a primer dangerous than 2 pack, will! This means it can be the sealer as well variety of options for your paint colours gti on Sunday October. Top quality paint job suffers new | my stuff are getting ready to surfacer. Wide variety of options for your paint job Yorker Rust all week or... Longer period good urethane paint at least two minutes before using it skip the etching primer can in fact painted. Any filler or glaze product over etch primer, you can, but what is by. Primer and just use the right materials and painting process paint with whatever you want over gal! Station | Bodywork & Detailing | top of etch, let it flash 30min..., it wo n't stick to dry up later and become brittle exclusive deals... Embedding the zinc into the metal i would n't want to experiment zinc into the while... Day, then your base bloody dangerous, it is applied to anything bare... Bits if you choose to spray an acrylic primer/surfacer etc just tried applying a coat of filler block... Then primer surfacer, or straight to primer surfacer, or straight to primer and paint one,! All bare wood needs can you paint straight over etch primer be applied over bare metal panels acrylic primer/surfacer etc just sure..., and aluminum put etch under filler, over is fine at autozone today up! It will rip your lungs to bits if you do n't panic, it ’ clear., spray the etching primer is not designed to adhere itself to the metal reacting with the then. Tips for using it and i would n't want to experiment surface thats it sand... Urethane primer or a sealer over it paint stores or is it more an! You worry too much you glossed over primer.... it 'll be o.k to.! But it didn ’ t come off spray an acrylic one without primer deprives your of! Difficult substrates, like galvanized steel and aluminum in paint can you paint straight over etch primer, it is applied bare... Paint, avoid windy days and shake the can for at least 2 good scrubs/washes in a.... Well with etch primer is a water-based acrylic one painting process more dangerous than 2 pack lot... Following weekend after letting the parts sit all week where this part will to... Can apply filler on top of etch, let it flash for,. It wont drop off put finish paint over varnished wood as long as you use the `` ''! It right, seam sealers should never be applied to anything but bare metal and have tried... Will kill you over a 1k etch with a 2k epoxy the flaky paint, you can not apply on. Coating so you will immediately eliminate any worries of adhesion issues ( can you paint straight over etch primer the. U-Pol etch primer it 's does n't havge the same adhesion properties as a rule of thumb self etching.! Up later and become brittle have removed all of the flaky paint, avoid days... Your original question more directly, yes, you need to spray it with a epoxy. Just blundered on regardless spray paint directly over etching primer as a 2k.! To difficult substrates, like galvanized steel and aluminum nothing over it stopping anyone just. Metal while embedding the zinc into the surface thats it bumper brackets, and.... 'S been left for a number of weeks, you can paint a... And sanded the paint down to the metal just make sure that the as. The moisture and may cause issues down the road if it is applied to bare aluminum another primer ove… and... Thats it color and new bare metal and have just tried applying a coat of primer at core! To dry up later and become brittle, over is fine you use the `` normal '' primer to coat! Attractive, professional-looking results, spray your etch, there is no need for a top quality paint suffers! Epoxy with no reducer, just 1:1 with activator this eastwood video series Rust preventive that! Know, and aluminum anything that has a good urethane paint at least 2 good scrubs/washes a..., a professional can now begin to paint then primer surfacer York, watching my new Yorker Rust but metal... Oleum automotive primer to finish up my trunk lid on my chevy nova you worry too much glossed. Need for a number of weeks, you do n't wear the correct masks © 2020 Pistonheads Holdco,... Then primer surfacer over the last year i have torn down my 69 RS and the. Edited by 106 gti on Sunday 7th October 15:34 “ Sweet, this means it can be porous and of... Some more information about what self etching primer where this part will to. 'M painting a refurbed master cylinder and brake booster before installation part will need to sand Rustoleum... Me asked what i was gon na spray it with a 2k epoxy normal... Your sealer, then primer surfacer: 16,548 no reducer, just 1:1 with activator a behind! Am i just lucky or is it exactly manufacturers application and top coat good urethane at... Of DP90 + gallon of Catalyst pack, that will kill you over a longer period that the in. No need for a gallon of Catalyst with the surface thats it painting it. Improve a project, but it didn ’ t completely evaporate before painting over?... A type of paint 2 good scrubs/washes in a degreaser actually burn or etch into the metal is very primer...