Repair steps of automobile wheel hub scratches: 1. Clean the hub to check all scratches, scratch depth and whether the hub is broken. If there is crack or deformation on the surface of the hub, it can't be repaired, and the hub can only be repaired without fracture and deformation. 2. Wipe the wheel hub with wax paper after cleaning; 3. Re-spray the wheel hub after polishing the putty, aim the wheel hub spraying liquid at the sprayed putty, and lightly spray it back and forth several times to complete the whole step of repairing the scratched wheel hub; 4. The scratch of the wheel hub is rough, which can be smoothed with fine sandpaper.