Yeah, they do, Realgun. I bought one this summer. They work real good for removing decals off of some finishes and burn thru the finish of others. A stated caveat is 'do not use on lacquers'. I verified that. It burned right thru the lacquer, but it worked real well on enamel. The instructions said nothing about gel coat so I would proceed with great caution. If it does not burn the gel coat, it will be very effective. I still might try to warm up the decals b4 using it.Originally posted by Realgun:<br /> Make sure the hairdryer is on high heat.Or you can use a heatgun carefully. They have a rubber thing at paint and body shops that work like an eraser too that fits in a drill.