What is the dark white paint on the surface of the car after it hits the pit?
Putty is putty. When you make a hole in the surface of your car, the sheet metal mechanic will help you shape it, but no matter how smooth it is, it will not return to its original level. Then the next step is the painter's job. First, paint you with putty, then dry-grind and water-grind to make it smooth, and then you can spray paint. . .