Don't have a code but there are places that specialize in wheel repair. Kwicksilver Wheel Repair – Rim Repair & Alloy Wheel Repair Franchise
This is for a local shop but you get the idea of what they can do. Like the Paintless Dent Repair they are amazing. If it's not too bad in the past I have used clear nail polish. Holds up well to cleaning and scrubbing brake dust.
