From what I understand if the curbing is too severe the only permanent option is to smooth it out and repaint them. If too large an area is filled I have heard it is very likely it will break off in time. If the curbing is light I have seen them filled (I do not know what kind of filler is used) and then reshaped. I have seen this kind of work done out of a van with unsophisticated equipment with next to perfect results. If you start to look around you will notice a lot of wheels that are not perfectly round with light paint defects.
Considering the bargain AG has for it, I would too, and did. It's a great wax, Souveran on steroids with better durability.