No. He just likes to pressure wa(r)sh clean spots on them. I actually don't mind getting my hands dirty... unlike some.
Cleaning wheels is easy with Dodo Juice Ferrous Dueller Iron Remover. You do not even need a pressure washer. Sonax and Sonax plus used to be the best but this stuff beats them both hands down and it's safe for your paint. I have sprayed my whole car down after claying and it pulls stuff out of the paint even the best clay cannot pick up. Also this guys has great looking R53. (This is his thread after all)