I like using good ol' soap and water on refinished wheels....and perhaps some scotchbrite pad if the finish is already toast......
As for anything more aggressive, check the label and see if there are any interactions listed for magnesium!
I wouldn't think that normal wheel cleaner for getting brake gunk off would be a problem, but sometimes these do damage paint...hence their warning to test some place inconspicuous!!! But you have to consider that they use this stuff at the car washes on clear coated wheels...... it's the wheels where the paint/clear is worn off or just plain isn't there!
WD40 also works great for greasy blobs etc......!
Good luck! PITA job!!!!!
Steve
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