What if the plastic shell of the car is scraped flat?

The plastic case refers to the front and rear bumper handles!

If it is not serious, he will automatically return to the initial state after the shutdown time. If you don't paint it, don't deal with it.

If it's serious and it hasn't recovered after 2 days, it needs to be taken out and then recovered with a plastic hammer.

No need to change. Unless there is damage.