How bad are we talking here? Are there a few nicks or did they scratch the crap out of them? There is such a thing as normal wear and tear and then there is just plain abuse. Which is it. If it is just a nick or two get over it and buy a paint pen you are going to get a lot more nicks and scratches in the future. But If they were neglagent then yes have them re powder coat your wheels. I know a few people who have had this done.