I've got bumpers coated with self etching primer. I'm reading that I need to coat with another type of primer before painting. Issue is that I cannot find the right type of primer to use next. Is it Rustoleum 2k? Something else?
Steps for painting self etching primer
- Thread starter Kevin Q
- Start date
Not sure why you would need to prime with another primer, never heard that before. You should be able to topcoat that with just about any paint.
Who said this?
Who said this?
I’ve used the self etching primer on bumpers and it held the top coat just fine. You don’t need a second primer.
Where are you reading that? The manufacturers data sheet? Exactly what is the product on your bumper?
I read a number of autobody and painting sites that claimed needing to do this. Just talked with Rustoleum and they say I'm good to top coat.
Steelhd is on to something here. Always read the tech data sheets on your paint. etching primers commonly contain phosphorous acid. The concern is that the solvents in a 2k base coat application may “reactivate” the acid and cause lifting. An application of epoxy primer or a sealer is always good insurance to prevent this. I have in the past painted directly over self etch primers and if you choose to do so put your first base coat down real dry .
Keep in mind that manufacturers recommend that you scuff-up the primer if it is outside of the recoat/top-coat window. This is applies to a number of popular DTM, catalyzed and self-etching primers.
For example, Summit Racing DTM primer (what I'll be using for my TJ in just a few short weeks), says the following:
DTM Epoxy Primer may be topcoated for up to four days without requiring the surface to be abraded or any additional prep. After four days, epoxy primer surface MUST be abraded to ensure proper adhesion prior to topcoating.
Their flat etching primer states the following:
May be recoated in 30 minutes. If sanding is desired, SUM-SWSP200_-12 may be sanded in 60 minutes. Do not wet sand. Scuff sand with 320 grit or finer sandpaper after 24 hours. Repriming is not required
I spent a handful of summer working at a body shop and for us the base primer coat was always really meant for surface/corrosion protection, which I suspect is the same case as your bumper. If you care how it looks, at least in the long term, I would scuff it with a soft Scotch-Brite pad and then give a good wipe down with solvent/reducer of choice. If you're just going to bolt it on and bang it up on the rocks, then I wouldn't bother and would just slap some Rustoleum on it and call it a day.
For example, Summit Racing DTM primer (what I'll be using for my TJ in just a few short weeks), says the following:
DTM Epoxy Primer may be topcoated for up to four days without requiring the surface to be abraded or any additional prep. After four days, epoxy primer surface MUST be abraded to ensure proper adhesion prior to topcoating.
Their flat etching primer states the following:
May be recoated in 30 minutes. If sanding is desired, SUM-SWSP200_-12 may be sanded in 60 minutes. Do not wet sand. Scuff sand with 320 grit or finer sandpaper after 24 hours. Repriming is not required
I spent a handful of summer working at a body shop and for us the base primer coat was always really meant for surface/corrosion protection, which I suspect is the same case as your bumper. If you care how it looks, at least in the long term, I would scuff it with a soft Scotch-Brite pad and then give a good wipe down with solvent/reducer of choice. If you're just going to bolt it on and bang it up on the rocks, then I wouldn't bother and would just slap some Rustoleum on it and call it a day.
Thanks for the advice guys. I scuffed, wiped down, and painted. Going to let it dry then clear coat it.
I used a self etching primer, and didn;t read the instructions that said another primer coating was required. My top coat bubbled and peeld off.
This is the self etching primer I used.
https://www.eastwood.com/eastwood-self-etch-primer-gray.html
This is the self etching primer I used.
https://www.eastwood.com/eastwood-self-etch-primer-gray.html
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