I can see this causing all type of scratches
 

http://www.autopia-carcare.com/car-b...l#.V9HiDPkrLIU



I use a regular old microfiber towel when drying my car. These things are probably no different than what you get at the car wash but it would take the smallest piece of dirt to go across your paint and scratch it up.

So instead of blowing the water and any leftover dirt off of your car with this "blow dryer". You would rather drag the water and dirt across the paint with your old microfiber?