2. You can also choose to paint the door and then maintain it. However, this situation will generally affect the overall effect of the car, that is, the paint after spraying is likely to be very different from the overall color, so this depends on personal choice.
3. Under normal circumstances, no matter what kind of collision, if painting is needed, it is best to choose the whole vehicle for painting and then maintain it.
Note: If your car is scraped, you can choose freely. If you scratch someone else's car, you'd better choose the third one.