Is it true that the brushes can scratch the car?

No, not at all. As long as they are kept clean and looked after properly, the brushes will not scratch the car or damage the paintwork or the glass. Nowadays we use extremely reliable electronic elements that guarantee a constant level of brush pressure that is completely safe for paintwork. Application is much gentler but just as effective with the new foam products. Even so, it is important to make sure that the brushes are adequately maintained. A preventative brush cleaning product prevents brushes from breaking, which in turn makes them more effective and longer lasting.