Originally Posted by mr. 535i
talk to martind from auto finesse. his imperial wheel cleaner works great. and after you wash hit them with tough coat, and mint wheel wax. the next time you was it will make it much easier to get ride of the break dust.
this is the general idea right here. if you have embedded brake dust hit the wheels with sonax wheel cleaner and after that you will want to put on a wheel sealant. from then on washing should be pretty easy as the brake dust should come off with water and regular car shampoo