well when you get a chance check with your local paint store...see if they have a 3M product called an eraser wheel.i used it with my cordless drill and it did a good job with out using a heat gun...if your using a cordless be prepared to re-charge the batteries..often...also if the decals have been on there a while be prepared to have outlines where the decals were before you took them off..i had to buff my trailor to get rid of the outlines....good luck