1. It can be solved by continuous braking. If there are not many rust spots, continuous braking can be used. But when using this method, we must pay attention to traffic safety and not affect others' driving. When driving, we can gently apply the brake and use friction to remove slight rust spots after a period of time.

2. We can solve rust spots by using sandpaper with water. This can also be solved by ourselves. We need to find water sandpaper, rub the rust spots, and then apply the primer. But this method is only suitable when there are not many rust spots.

3. We can go to a repair shop or a 4S store. If the disc on the wheel hub of the car is seriously rusted, we can only go to a repair shop or 4S shop, and professional staff will have specialized tools and methods. They will clean, polish, and repaint, and if necessary, perform sheet metal operations.