I use WonderWheels on my Minis wheels, doesnt do them any harm. Depends on the quality of the lacquer I guess. The lacquer tends to peel on cheaper alloys.
I used to use EBC Greenstuff pads, they're useless. Not much dust but dont perform as well as they say they do, so gone back to EBC Blackstuff now and got no dust on the alloys at all.
I even tried getting the Greenstuff pads hot to see if they performed better but they dont. Waste of money IMHO.
I always clean mine once a week so it doesnt tend to build up.