If the damage is bad, get a good used wheel. it's cheaper than fixing it, unless it's a particularly rare one in which case let a pro deal with it. For minor curb rash, just file it smooth if you can then sand with progressively fine sandpaper. Stop when you get to 600 wet and dry, polish, degrease again, then paint. The results can be long lasting and superb if you take your time.

The paint you want is Wurth - use that only. It comes in the right color for Mercedes wheels, 3 thin coats of color and two thin coats of clear on a properly prepared wheel. That means you've degreased, stripped, sanded and polished the wheels.

-- Richard Sexton