It is going to take some rubbing unless you want to go and get a Mothers Power Ball and some Mothers mag wheel cleaner. This stuff combined with the power ball is the sh*t man. It will clean them, but it's not cheap.
GTP is better, but also cost more to repair. have the front suspension checked before buying it. My step son loved his, but he traded it because it was going to need the whole front tnd rebuilt and it was going to cost him $2800.00.