Heh...nope. They're still on there in full force. Come to find out, with these titanium/hyper silver finishes, the special paint and the finish they use aren't very durable. So the previous owner must've sprayed on an acidic cleaner and let it sit too long. The acid works its way beneath the clearcoat and draws up the dark paint and then you have the stain. Can't get it out with polishing. Got a quote already from some neighbors who run a mobile wheel repair place. I'll have to decide at this point to have the wheels re-painted or get my windows tinted. Hmmm...
Lesson learned from the previous owner. Don't ever use wheel cleaners. And I don't. I like to just use soap and water - thus meaning not being lazy and letting brake dust accumulate.