Hello, I'm not a professional. I recently bought some microfiber towels to apply a spray wax and clear off water drop marks after being caught out in the rain. I tested the towels on a small portion of the car with very light pressure and found that they were leaving swirl marks/scratches in the clear coat. I've had my car washed several times by hand at a detail shop and they donby priselac - Auto Detailing: Secrets of the Experts