Please excuse that last daft question, just went out and tried it lol. To say I'm embarrassed with their condition is an understatement. They look like they have never been done. Look a bit better now but not totally cleaned. I seem to have completely run out of elbow grease after all the washing, drying, clay bar and polish I've been doing all morning. Just waiting for sun to go down later to finish off with a coat of wax.