Painting plastic airlid on LS1

Thinking of painting my airlid, airlid base and manifold on 4th gen, What do I need to make it smooth. High build primer and plastic promoter, both, either one or what? Anyone that has done this could you post some pictures? And yes I have searched for this but can't find anything. Any help greatly appriciated.

I am in the process of painting mine, i Used adhesion promoter followed by high build primer. Color coats, then clear if you want to go that route.

Thanks man are you doing it with rattle can's or real paint gear? How is it coming out?

I have a gun, but just used rattle can paint I had left over from doing my tail panel. Shot the clear today, so I will post up pictures in a few days after I westand and buff it.

Pics? ^