I wouldn't repair it myself to be honest. If it's not going to kill you, just stick with those and either get it done in the future or get new wheels. I have curb rash on my 189s but I'm only going to use them in the winter so I don't care enough to spend the money.
2007 E90 335xi - "Sera"
aFe Stage 2 DCI | AE Performance Exhaust | COBB Accessport | HPB Interior LED Kit | M6 Wheels | ER Charge Pipe | MTEC LED Angel Eyes | Helix Intercooler