i bought a set of 68 deluxe wheelcovers($20) that are in good shape(no dents or scuffs)with the red center running horse. the grey paint is worn off some and the redcenter is also worn. how do i refurbish them. someone suggested model car paint for the red. how do i match up the grey? it looks like a gun metal grey.or should i leave them alone. thankyou very much