I just picked up this '09 with "custom" black wheels...as the salesguy tried to point out until I pointed out the big chunk peeling off one of the wheels. Just based on the picture and the fact that I can peel black of in big sheets from one of the wheels, are these plasti-dipped? Is this stuff meant to be temporary? Only one is peeling but the other three are pretty chipped up around the edge. They put new tires on it so I'm guessing it's from that.