Thing is, it's not a road "grime" or brake dust or anything of that nature. It's a stain of some sort (the rims are as sensitive as I was told), that's why acid washing before applying this protectant was my seemingly only option. The first link was an impressive cleaner, but it seems like it takes off physical stuff that you can feel. You can't feel the 2-3 stains I'm speaking of.
Here's a picture of the rims, but nothing up close of the actual stain. I guess I could get that?
