This is necessary. If you buy a new car, you generally don't need to put a film on the door handle, but in order to prevent scratching the car paint, you can put a protective film on the door bowl, and it is still necessary to put a film on the door bowl. The door bowl is where the door handle outside the car is recessed. Many cars that have been driven for a while will have scratches on the door bowl. Sticking a protective film can effectively protect the car paint from being scratched.