I'll get this one for ya Paul, he had the trim painted when he had his bodykit painted so it is professionally painted and i doubt that it is gonna be chipping soon. For mine I just used DuPonts interior trim paint, sanded then smooth and painted them, then cleared them. They have been painted for a few months and so far so good. http://www.mustangmods.com/data/1693/new_pics_8.jpg
He is right, I had them sprayed when the ground effects were painted, they show NO signs of chipping. You must sand them down pretty good though as there is a rubbery type coating on the plastic parts. I sprayed them myself about 4-5 years ago with an aerosol spray can filled with BZ paint (that's my factory paint color code). This worked great, but due to my lack of experience with painting I had some runs and a few fish eyes, so I had it re-done by the "professionals" when the ground effects were repainted. Hope that helps,
Paul