I thought my steel brakes on my F80 were bad but the F90 steel brake pads are horrendous for producing brake dust. I have coated my wheels with Chemical Guys Wheel Guard and Sonax Spray and Seal. I have used several brake dust cleaners and the only one that works the best is Sonax Wheel Cleaner Plus. I spray it on when the wheels are cold and use a pressure washer several minutes later. It removes 99% of the brake dust without scrubbing the wheels. However 20 miles later the wheels look horrible with brake dust.
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