I painted my mazda millenia rims with Duplicolor charcoal color paint (basically gunmetal) and it's been almost one year now that I've had them on and no chips or scratches yet, and it's been through a full Canadian winter also! I had the rims sandblasted by the machine shop that bored out the centers, then I primed them with sandable primer, then did the coats of paint, finished off with clearcoat.