I've got a generic set of wheel brushes from online, they do a good job but do leave some micro scratches (gloss blacks wheels) easily buff out but it's too tedious to do after each wash.
I have the brushes from autobrite direct and they do a good job but same again with scratches.
Personally I'd go for a set which are like a soft microfiber - wheel woollies seem to get a good rating but I'm sure anything like them will do a good job
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