They look to be cookie cutters - porsche wheels. if they are genuine then doing them in one colour ruin them! he would run thie risk of getting stoned to death by the porsche owners club LOL. If they are genuine, then really they should be done in black, then the outer section Diamond Cut. It's not a cheap job, but is worth it. If he's just planning to use the wheels himself and not sell the car or wheels it won't matter I guess, until he does want to sell.
Les