Once the brake dust has been removed with a 100% acid-free wheel cleaner (P21S Wheel Cleaner) apply a citrus based cleaner to the surface, agitate with a boars hair wheel brush and rinse off, dry thoroughly and then apply a polymer sealant for protection, this will also make future cleaning easier. A polymer is recommended (ZoopSeal) as it has a higher melting temperature (350oF) compared to Carnauba wax (180oF) a wheel surface will reach a temperature in excess of 120oF due to rotor friction and in excess of 195oF when parked in the sun.
Periodically remove the wheels (one at a time) to enable the back of the wheel, callipers and give better access to the wheel wells. Should the wheel surface have small scratches they can he removed with a mildly abrasive polish.
Tar should be removed with a solvent type cleaner (and #0000 synthetic steel wool if necessary) and any bonded contaminants or over spray removed with Detailer's Clay, then clean surface with a chemical / polish (Klasse AIO) wash and dry wheel surface thoroughly, and apply ZoopSeal.
JonM
