My Dyna had cast wheels that seemed to be untreated, and the back wheel in particular got really gunky from belt dust, etc. I went to the HD dealer and asked what to use to clean them, but the stuff they recommended really didn't work. I have clean new wheels on my Electra Glide. I think they are treated, and I want to keep them clean. I read elsewhere on this forum that something called Barkeepers Friend works well to keep wheels clean. Have you tried it? Does it work? Is there something else you recommend? Sorry if this repeats earlier posts, but I'm new to this site.