A the bumper is made of plastic; 1, the collision part is only concave without cracking, so it can be filled with putty, polished and painted. 2. If there is a crack, make a small hole at the end of the crack to block it, and handle it according to the method of 1. 3. The collision site is treated by patching, that is, the collision site is patched and then treated by 1.

B, the bumper adopts automobile plate (iron plate); 4. The paint skin is undamaged, leveled with special tools and restored to its original state. 5. After the paint skin is damaged and leveled, hang tin to make the paint surface smooth or scrape putty to make the paint surface smooth. 6. Dismantle the bumper according to sheet metal processing.

There are many other ways, which can definitely be repaired. The cost is limited.