I have the painted 2006 10 spoke aluminum wheels. Lots of little corners to get at. I usually use paint cleaner and lots of elbow grease to get rid of all the discoloration from the winter. Just did the spring cleaning with tire rotation when my dad handed me some Turtle Wax Rim Cleaner (orange bottle), I really liked it, it removed all the discoloration without scrubbing. Wear rubber gloves as it can be harsh on the hands.