Find a good wheel man
I have the same (or worse!) problem on the AMG wheels on my C320- the original owner parked like Helen Keller. As a matter of fact, I'm taking them in to be remachined and clearcoated next week. I was under the impression that your wheels have a polished stainless steel lip, not chrome, in which case it should be able to be repaired. I had something similar done to the Ronals I had on my BMW.
You should be able to find a local distributor who can refer you to someone, we have one here in LA who specializes in Carlsson and AMG. Also, ask your dealer, they might be able to recommend someone.
In my experience, anything can be fixed, it's just all a matter of cubic dollars.