Re: Painting Bumpers

Posted by Fish'n Jim On 2022/11/17 15:40:02

I wouldn't sand. That'll permanently ruin the chrome surface. Listen to what "Kaz" said.

Make sure it's very clean, no wax, silicone, etc. I use prep-sol before paint.
I think self etch is bad as well. People have been using it wrong ever since it came out. You don't want acid trapped between the metal and paint - bad for the paint and adhesion. That's mainly use for aluminum to tooth the anodizing which neutralizes it.
You can use a little adhesion promoter spray, in place of the self etch, if you're worried. It's used for plastics where there no good penetration and shiny surface.