How to keep CB magnet mount from scratchin paint?

On the tow trucks the good magnetic lights that go on the towed vehicle have a rubber type boot. A possible solution to duplicate this might be something like this..... Red wouldn't be my color of choice but someone might make it in black. The stuff worked real well on the tools we dipped.



http://www.harborfreight.com/14-1-2-half-oz-plasti-dip-red-2686.html