If not, wet them with cool water. Apply a Wheel Cleaner to a small, inconspicuous part of the wheel to ensure that it is appropriate for the wheel type. Note if any discoloration occurs. Spray a Wheel Cleaner directly on the wheel, and allow it to dwell for no more than one minute. On stubborn brake dust, agitate the cleaner on the wheel's surface with a spoke brush.
Pressure rinse the wheel thoroughly.
Stand at different angles to ensure that the product is rinsed completely. Spray both the wheel and tire with a General Purpose Cleaner, and allow it to dwell for one minute. Applying the alkaline cleaner to the wheel helps neutralize any acid left from the Wheel Cleaner. Agitate the cleaning solution on the tire with a stiff-bristled brush. Pressure rinse the wheel and tire thoroughly.