You gotta try Gel-Gloss from Home Depot or similar store. I use it for any type of metal, glass, fiberglass, car paint (light colors) and a bunch of other stuff.
2004 E60 530is, Delivered 12/12/03, TiSilver/LGrey, PP, SP,PS, PDC, ACC, FRS, Step, Xenons, clear bra, body colored rear inserts. (Retired, 1983 henna red 320is)
2004 Corvette Z06 Commemorative Edition