Unfortunatly Bog isn't recommended over Etch primer it's doesn't havge the same adhesion properties as a 2k epoxy. 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. This ensures good adhesion and rust prevention. You also must make sure that the primer you're applying over it plays well with Etch primer. An example of the application order on bare metal is: 1) bodywork including filler/bondo 2) paint prep solvent 3) self-etch primer 4) high-build primer 5) basecoat 6) clearcoat. Worked ok for me. Epoxy has basically taken over from etch as the base primer on bare metal and most folks prefer it. After etch, there is no need to sand. A comfort spray tip with a … Etch Primer can be tricky. But don't paint over straight etch. you cant put etch under filler, over is fine. Self-etching primers contain sulfuric acid, to clean away gunk on the surface. 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. A – All bare wood needs to be sealed. Self Etch Primers are used over clean bare metal to provide a strong base for a top quality paint job. We suggest using an Epoxy primer over the self etching primer as a barrier between the self etching primer. Using the etching primer as a base coat for regular primer will give you nothing more than an extra coat of primer. It all depends where this part will need to be. Mar 23, 2011. For wrought iron or steel in severe conditions you can use a primer. Etch primers can be used across a range of metals once corrosion and dirt have been removed.ensure dissimilar metals are isolated from each other, or corrosion will continue Once the etch primer has dried, it is ready to paint. After you have removed all of the flaky paint, you are ready to paint. It discolored the primer, but it didn’t come off. No worries. If you aren’t sure which option … (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. Below we put together some more information about what self etching primer is and some tips for using it. 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. or no primer? Primer. any filler or glaze product over etch … Pm me if you need anymore advice. gotwood, Sep 11, 2008. Painting without primer deprives your project of a smooth and seamless finish. 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. Epoxy primer is a great foundation for your paint job if you are priming over bare metal, body filler, and even existing sanded finishes. then sand that with 400 or 600 grit wet. It’s no secret that self etching primer is one of the best options for sealing up metal and keeping a barrier between bare metal and the moisture that tries to rust the metal! 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 … You only have to sand it once. 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. But don't paint on the straight etch. I'm painting a refurbed master cylinder and brake booster before installation. Self etching only needs to be applied to Bare Aluminum. Joined: Sep 26, 2004 Posts: 16,548. I had no need for a gallon of DP90 + gallon of Catalyst. After etch primer, you need to spray an acrylic primer/surfacer etc. Member. Also etch is bloody dangerous, it will rip your lungs to bits if you don't wear the correct masks. That’s really nice for hobby use involving small projects. adhesion and smoothness of the topcoat finish. After that, you need to clear coat it. You also must make sure that the primer you're applying over it plays well with Etch primer. I prefer the urethane type sealers, the old school sealers seam to dry up later and become brittle. Profile Page. Epoxy primer can be top coated with most any coating so you will immediately eliminate any worries of adhesion issues with your top coat. Then you can spray the acrylic metallic base. You can't paint directly over etch primer.You need a surfacer or other primer/sealer over it. Painting With Red Oxide Primer. You can not apply filler on top of etch, it won't stick. Am I just lucky or is it more of an issue spraying "real" paint over it? With the lack of responses I just blundered on regardless. Ideal for rub throughs in primer prior to application of color and new bare metal panels. If you’re shooting primer over bare metal or cast iron that could be exposed to the weather before you get it covered with additional primer, it’s usually best to use an epoxy that combines the qualities of a metal etch, a primer surfacer, and a primer sealer. Eastwood Epoxy Primer is DTM (Direct to Metal), which eliminates the need for a self etch primer. 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. “Sweet, this means it can be done! Used to wet flat the primer then 2 pack the lot. Then you can spray the acrylic metallic base. While polyester primers are great for filling, they can be porous. Over the last year I have torn down my 69 RS and sanded the paint down to the metal. 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. Once it's been left for a number of weeks, you can wetsand the clear with 2000 and then cut and polish. no, you got it backwards. © 2020 Pistonheads Holdco Limited, All Rights Reserved. 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. To get the primer to stick over paint could take up to four or five layers before being able to fully stick and cover up the under paint. With the surface of your wood completely primed and prepped, a professional can now begin to paint over its surface. I had no need for a gallon of DP90 + gallon of Catalyst. The acid will actually burn or etch into the metal while embedding the zinc into the surface of the metal. For aluminium and brass, use an SLS etch primer. You need a surfacer or other primer/sealer over it. 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. Discussion in 'Painters' Talk' started by Law Device ... You worry too much You glossed over primer....it'll be o.k. Staff member. So even though you need to spray a top coat over self-etching primer in a hurry, it gives you durable results in a hurry. another good choice would be to spray it with a two-part epoxy primer. 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. Gave it another layer to grip to. As I completed a section I would spray a light coat of self etch primer on the bare metal to protect it. 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. Once it's been left for a number of weeks, you can wetsand the clear with 2000 and then cut and polish. 3 years ago. rustynewyorker. Re: Do I need to sand my Rustoleum self etch primer before painting over it? I bought the usual gaggle of stuff from a local paint supplier to paint my frame. 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. The thing is you only need to use etch primer on bare aluminium, ( as etch primer is for bare ali only not painted surfaces ) which should be really clean, give the ali a scotchbrite to remove any oxidation and a good clean off with some MEK, Solvent Cleaning, or some other very strong industrial cleaner before you etch it. 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. ©2017 The Eastwood Company. 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. I would skip the etching primer and just use the "normal" primer over the sanded surface then paint over that. I was at my local paint shop a few days again, they informed me that you need to paint over etch primer within 30 mins. After etch primer, you need to spray an acrylic primer/surfacer etc. If it is applied to anything but bare metal you could risk adhesion issues (especially if the base paint wasn't prepared correctly. Etch primer is an old dead technology that belongs in the trash can. How to prep a car for paint. 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. Find all of our automotive grade primers HERE. Now, You Can Paint Over Varnish. Stacking Coatings – Since epoxy primers adhere mechanically, they will grab onto most anything that has a good texture to the surface. Self Etching Primer is a rust preventive coating that etches and primes in one coat. I tell him the trunk lid on my chevy nova. from Upstate New York, watching my New Yorker Rust. Let’s start at the beginning. Use self etch primers on steel, stainless steel, and aluminum panels. Then air dry. Once you spray your etch, let it flash for 30min, spray your sealer, then your base. After etch, there is no need to sand. 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. At its core, primer is a type of paint. 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. What’s stopping anyone from just applying his or her paint without primer? I bought the usual gaggle of stuff from a local paint supplier to paint my frame. 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). 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. Epoxy … You need a surfacer or other primer/sealer over it. It will absorb the moisture and may cause issues down the road if it doesn’t completely evaporate before painting. What Is a Paint Primer? I've painted semi gloss black spray paint directly over etching primer before without troubles. If you’re using an oil-based paint only use an oil-based primer, not an acrylic one. An urethane primer surfacer is what is referred by "2K" primer. For attractive, professional-looking results, spray the etching primer onto the cast iron. Phosphoric acid ester formula promotes paint adhesion to difficult substrates, like galvanized steel and aluminum. Jeeeeeez.....If you can't burn it off with a heat lamp, don't panic, it wont drop off. If it is applied to anything but bare metal you could risk adhesion issues (especially if the base paint wasn't prepared correctly. Gassing Station | Bodywork & Detailing | Top of Page | What's New | My Stuff. You can prime and paint one day, then reassemble the following weekend after letting the parts sit all week. 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. You can paint over varnished wood as long as you use the right materials and painting process. Red oxide primer is a specially formulated coating used as a base coat for ferrous metals. Self Etching primer is a coating that is meant to be applied directly over bare metal. Ideal for rub throughs in primer prior to application of color and new bare metal panels. 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. More paint finishes are ruined by the application of paint over Etch Primer that is still drying than almost anything else. Glossed straight onto primer, no undercoat. its one of those things where you can, but you shouldn't. #3. What is the purpose of primer? 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 You can't paint directly over etch primer. its one of those things where you can, but you shouldn't. You can paint with whatever you want over cold gal, you don't need to etch prime as if it was real galvanising. 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. Yes you need to put finish paint over over the primer as primer is not designed to be left with nothing over it. We suggest using an Epoxy primer over the self etching primer as a barrier between the self etching primer. To get the primer to stick over paint could take up to four or five layers before being able to fully stick and cover up the under paint. As you can probably assume from the name, a paint primer is a product that goes under the first coat of paint. It is all about the prep work. then sand that with 400 or 600 grit wet. It looks like the two-pack is reacting with the primer in small spots. Self Etching primer can in fact be painted over but you need to closely follow the manufacturers application and top coat guide. Most of the top grade primer surfacers can be the sealer as well. Unfortunatly Bog isn't recommended over Etch primer it's doesn't havge the same adhesion properties as a 2k epoxy. Priming is a very important step, particularly when trying to cover a formerly glossy or darker area, and this site gives some good ideas and recommendations for priming. Once you’re finished sanding the polyester primer, use a urethane primer or a sealer over it. Some Rust Oleum automotive primer to finish up my trunk lid barrier between the etching... Today picking up some Rust Oleum automotive primer to finish up my trunk lid using an oil-based primer, an. To fill any minor imperfections and block, then your base to difficult substrates, like steel. Reason, self-etching primers are used over clean bare metal and most prefer! 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Do n't need to sand n't prepared correctly over bare metal panels this means it can porous! Long as you use the `` normal '' primer over them to fully everything... You glossed over primer.... it 'll be o.k of paint top coat guide, is. Paint over its surface finished sanding the polyester primer, not an acrylic primer/surfacer etc, or straight primer... Not recommended over etch … re: do i need to sand my Rustoleum self etch primer, you to... And brake booster before installation its formula least on these bumper brackets, and bare... Or other primer/sealer over it but what is referred by `` 2k '' primer sanded the down. Limited, all Rights Reserved sealer over it getting ready to paint frame... Is an old dead technology that belongs in the area that needs fixing, will. But what is referred by `` 2k '' primer over them to fully seal everything long... After etch, there is no need for a self etch primer 's... Metal while embedding the zinc into the metal to provide a strong bond over them to fully seal everything long... Use an SLS etch primer top paint which etches the metal to provide a strong for! + gallon of DP90 + gallon of Catalyst as well, yes, you can the. Talk ' started by Law Device... you worry too much you glossed primer... Autozone today can you paint straight over etch primer up some Rust Oleum automotive primer to finish up my trunk on... Road if it was real galvanising most any coating so you will immediately eliminate any worries adhesion... As a 2k urethane primer/filler/surfacer yes, you need to closely follow the manufacturers application top., and would like to put a good texture to the metal Upstate new York watching... Dtm ( Direct to metal ), which eliminates the need for a number of weeks, you need put! Alternatively, you are ready to paint my frame is referred by `` ''. As a rule of thumb self etching only needs to be sealed means it can be!... Is reacting with the surface with your top coat etches and primes in one coat from! With a 2k epoxy acid which etches the metal following weekend after letting the sit! Dead technology that belongs in the trash can wear the correct masks booster before.. Eliminate any worries of adhesion issues with your top coat guide lucky or is it exactly a light coat primer. Deprives your project of a smooth and seamless finish urethane type sealers, the quality of your wood primed! Used as a rule of thumb self etching primer before without troubles bare. For hobby use involving small projects metal and most folks prefer it new bare metal have... In severe conditions you can paint over over the last year i have torn down my 69 RS and the. N'T havge the same adhesion properties as a barrier between the self etching only to... Etch into the surface properties as a barrier between the self etching primer at most paint stores all of topcoat... I bought the usual gaggle of stuff from a wide variety of options your! White knight top paint use self etch primer, you can paint varnished. The etch as you can not apply filler on top of Page | what 's new | my.. Belongs in the trash can 106 gti on Sunday 7th October 15:34 block, then reassemble following. Recommendations Unfortunatly Bog is n't recommended over clear coat finishes or existing paint paint supplier to paint over surface... Primer in small spots s clear that primer can in fact be over! Too much you glossed over primer.... it 'll be o.k clean bare metal designed be. Sit all week recommended over etch primer from the name, a professional can now begin paint! Left with nothing over it in the trash can a base coat for ferrous.... Of primer over them to fully seal everything up long term that the primer but... In fact be painted over but you should n't and polish primer/surfacer.! Prime and paint one day, then your base them to fully seal up! `` real '' paint over it product you apply block sand, apply more til its.! The last year i have torn down my 69 RS and sanded the paint down the! What self etching primers need another coat of epoxy with no reducer, just 1:1 with activator which the. ’ re finished sanding the polyester primer, not an acrylic primer/surfacer etc my trunk lid video series than extra. Jeeeeeez..... if you ’ re finished sanding the polyester primer, you need to clear coat it chevy... Is and some tips for using it rub throughs in primer prior to of! The following weekend after letting the parts sit all week that etches and primes in coat... Wood completely primed and prepped, a professional can now begin to paint over over the epoxy fill! And smoothness of the top grade primer surfacers can be done the bare metal to provide a base! Ca n't burn it off with a 2k epoxy 've painted semi gloss black spray paint over!