I have got a few white stains on my front driver side rims lip. I tries to scrub it with my nail but it doesnt seem to be on the surface it just looks like a stain that inside the polished aluminum lip. They are not clear coated. Does anybody know how to take this off. Whats the best product to use to do so?

 

There are several recent My wheels are stained threads, all without photos. A diagnosis with photos is difficult. Without photos it is next to impossible.