[QUOTE I recommend you go to your Harley Davidson or BMW Matorrad dealer and ask about a product called S100. I'll be using it on my wheels every week to keep them clean and looking like the showroom floor.QUOTE]
I have checked the S100 products @
www.s100.com/s100_cs.htm but I wasn't able to identify which specific product in their range you used. Most of them are cleaners not protectants, so perhaps you used their S100 Wheel Cleaner Gel. I wouldn't put it on painted alloy wheels though.
Hope you can provide more info.