Originally Posted by RoadRageDetail
That lip looks clear coated. Go hammering on it with a metal polish and you'll get some shine back but it will look marred up to no end.
Treat it just like any other clear coat. Once its clean, clay it. Once its free of contaminants, polish and wax/seal it.
Most is not all wheels, especially factory are clear coated today. I'd go with some strong but meant for wheel cleaners. These combined with a Daytona brush should prove to be very successful in removing most of the grime.
Claying can be your 2nd step as I'm certain there are embedded deposits that need to removed.
CarPro Iron-X is another great product that specifically attacks iron and other particles further removing them.
Mothers makes some nice foam tools designed to be used with an ordinary drill. Use a general compound and polish and you'll be surprised how nice they'll become...