Last plastic painting question, I hope

The biggest part of painting plastic and getting it to stick is cleaning it with a wax and grease or plastic prep remover( an alcohol and water mix will also get it done) Wipe it down a few times and use some kind of adhesion promoter. There are several different spray bomb varieties on the market. I'm not sure if the auto parts store would have it. I usually source it from a paint jobber. I don't think epoxy primer is suitable here. I would source some plastic primer in a spray bomb as well. With plastic less is more. A thick build up of paint will not hold up as well.