Not that will give awesome results......
Easy way is try cleaning with a neat APC like G101.
Not so easy is making a thin paste out of Hydrogen Peroxide and bicarb soda, wipe over the face of the wheel, leave paste on and sit them in the sun light for a few hours (or under a UV light). That may well give better results but more involved.
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{CML Distribution}
{ Penguin Bodyshells} 
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