I'm "refreshing" the wheelcovers on my 300 F, using the Club's new plastic medallions. I have successfully disassembled the covers, and I have the correct red paint for the center of the wheelcovers. Does anyone out there have any experience with painting these items? Should I use a primer to aid in paint adhesion? Should I roughen up the remnents of the existing red paint? Anything else? Thanks. Terry McTaggart