Step 12: Remove Bumperstickers and Pinstripes with Hot Air
For some pinstripes you need more heat, and a formal "hot air gun" is better.
If the bumpersticker isn't too old, the heat makes the glue soft and the decal flexible, so you can pull it off without ripping it. If your kungfu is good the glue will come off with it.
Otherwise you'll need to use laquer thinner or some other toxic laborsaving chemical to help remove it.
If the decal is very scratched or damaged by sunlight, you'll be scraping it off with a knife or razor like this gentleman at a boatyard in Richmond, California.