I acquired this to clean my deck. I was surprised at how soft the bristles are – I would have no problem using this on my car. That said, it was very effective at cleaning the grime off my deck and railings. Because it was so soft I had no worries that I was going to scratch anything, and because the unit itself is a soft rubber you don’t have to worry about the base causing damage either. Only complaint is when I used this in conjunction with the pole it continuously loosened where they attached. It would be great if there was some type of locking mechanism so that you don’t have to keep twisting it back to a secure position. In the future I can see myself using this on everything from my vinyl siding, to my car, to my garage floor and brick patio.