Many people say that reciprocating car washing machines harm car paint. In fact, when a car rubs against air during driving, it will adhere to the surface of the car paint with a lot of dust. Over time, it will form a film that will cause continuous damage to the car paint. High pressure water cannot wash away this film. A car wash machine with a brush that can evenly remove this film. The brushes are made of high composite materials and will not cause damage to the car paint.