He was not being a jerk. He was correct. Those magnet bases are strong and will attract minute iron based particles. It is surprising what they will attract. Even a microscopic particle between the magnet base and the paint will scratch. No you will also have to deal with the wires from the motorhome to the Honda. They will vibrate in the wind and cause scratches. If you get the wireless model of lights, you have to deal with batteries and radio signals. Why go through the hassle everytime you hook up and unhook. Get it done right, enjoy it and forget about it.