Hey Bill
I have wet sanded the turn signal switch covers with very fine sand paper and then sprayed them with Mar Hyde semi gloss vinyl spray for a great finish. I know the covers are supposed to be glossy black but I prefer the semi gloss color. It is important to make sure the covers are cleaned well in order for the paint to flow correctly and not “fisheye”. This paint works well on any plastic/bakelite parts and seat covers too! Good luck, Eric