I use this stuff on the main car, I have heavy right foot and regularly blackened front wheels (brembo pads fwiw)
https://www.amazon.c...0?ie=UTF8&psc=1
spray on at close range to get it foaming up, wait a few mins, hose off just at low pressure no jet wash rqd. repeat if necessary.
was getting fed up with being down on knees scrubbing 10 spoke alloys. wheels never looked so clean
(check if your wheels have any particular aversion to acidity / test small area first if unsure. it says "ACID FREE" but one prominent review begs to differ)
Edited by stuart bowes, 04 June 2022 - 05:21 PM.