Base color coat sticking better then primer?
I have a small spot of rust on a door panel on my car and after sanding down to bare metal, cleaning the area and letting it dry, I've been trying a couple different primers. Ive tried an enamel primer, an all-purpose primer, and a self etching primer, and all 3 seem to scrape off very easily using my fingernail after drying for 4-10 hours. They dont just peel right off but it doesnt take much effort with my fingernail. I've read that epoxy primer is highly recommended but I would think between the 3 I had I should be able to get one of them to stick. I decided to try something different and just skip the primer and see how well the base color coat sticks to the metal. After prepping the surface again and applying some of the base color coat to the bare metal, it seems to be sticking very very well after only maybe 30 minutes of drying. So I would think that something more needs to be done to prep the surface for paint, but the fact that the base color coat is sticking alot better then the primers has me wondering. The base color coat that Im using comes from a rattle can that contains a special order "Enamel Blend" color that my car came with from the manufacturer.
Can you see any reason why the primers I was using werent sticking too well but the base color coat was?
Maybe I'm just not waiting long enough for the primers to fully dry before testing their hold?
Any problem with skipping primer all together and just applying 3-4 coats of base color coat and clear coat? (its on the bottom edge of the door panel so its not necessary for the job to come out perfect)
Last edited by konsole; 08-20-2012 at 10:25 PM.