The real milage

[Justin B.]

That is what the wheels on my '81 R100 looked like when I bought it.  If you rinse extremely throughly you can get this stuff off with Eagle 1 Mag and Wheel Cleaner for unpainted wheels.  It is a mild phosphoric acid based stuff that bleached raw cast aluminum pretty well but must be followed by an extremely thorough rinse or a white residue will form.