I use electronic freeze spray from Radio Shack to remove stickers and decals. They sometimes call it component cooler. It freezes stuff down to -60 F. I've used it to remove decals from delicate wood surfaces with great success. Just spray it on and wait until the decal gets a 'frost.' Sometimes, the decal will just fall off. Other times you will need to grab an edge and get it started. Afterward, clean up any remaining residue with 'Goo Gone.' (sold at Home Depot, Meijers, etc)