When using etch primer the filler should go on to the bare metal first and then all is covered with etch primer. I want to fill in all the small grinding marks left from the manufacturing process. Rust-Oleum 249322 Automotive Self Etching Primer, 12 oz, Dark Green Spray Paint Self 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 It can’t be an epoxy primer, but it can be a urethane primer. A note about self-etching primer and aluminum. Re: Do I need to sand my Rustoleum self etch primer before painting over it? Some are a few hours; others allow several days. That etches into the metal and then the primer chemically bonds to it. Apply self-etching primer as a base coat. The tell-tale feature will be on the description of the paint container, specifically identifying the self-etching feature included in the paint. The reason being that the acid/chemicals in the etch primer "could" be trapped under the filler and cause it to break down if the filler is applied over the etch primer. When using epoxy primer it doesn't matter which goes first. This helps remove sanding scratches and small surface defects. In the meantime, it’s important to talk to your paint dealer about the time window allowed between the primer and paint topcoat. The most common paint type comes in a spray can version, which is the easiest to apply. Self Etching Primer is a rust preventive coating that etches and primes in one coat. Hope this helps, Mark This product is formulated to stop rust and is an essential step to achieve a professionally finished look. Feb 14, 2020 at 7:57 AM #4 #4. If you wait more than 12 hours you should, like he said scuff down with a Red scotch pad and reapply, then prime. I then use a primer sealer or epoxy primer to seal up the surface then apply the top coats. Self etching only needs to be applied to Bare Aluminum. Self-etching primer frequently comes in a gray color, similar to other primer paint. Posted: Fri May 01, 2020 9:44 pm Post subject: Rustoleum farm implement vs self etching vs epoxy primer? This will give the paint a texture to grip on to. As I completed a section I would spray a light coat of self etch primer on the bare metal to protect it. It is also sold as an aerosol mixture, which can be used as simply as spray paint. Rustoleum rattle can self-etch primer don't require filler primer, but the few Pro brands I looked up do (SEM, Eastwood). Self-etching primer is a primer that can come in an array of mixtures including a compound mixture that you have to mix yourself. Aluminum is especially difficult to paint. Self-etching primers have to have another primer over the top of them or the paint won’t adhere. The Self Etch Primer is a good first step for bare metal, or an Epoxy Primer. I plan on one of these primers, with rustoleum enamel gloss black top coat. Self Etching Primer … Your self etch primer should be just a really light piss coat, you don't want a thick coat, it could cause your top coats to crack over time. Hello, i was wondering which of these will be best for my floor pans and other chassis parts. 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. Rust-Oleum® Self Etching Primer is designed to prepare bare metal, aluminum and fiberglass surfaces to promote maximum adhesion and smoothness of the topcoat finish. Typically the next step is apply a primer surfacer, 2-3 coats then block sand with 320-grit. Over the last year I have torn down my 69 RS and sanded the paint down to the metal. Yota_Ivan, Jan 31, 2020 #3. Thanks for your reply. 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