x2 Used this to remove make my Rubicon sticker a "RUB ON" sticker.These work very well. Especially if the decal/sticker is disintegrating leaving the glue behind. It basically works like an eraser and will not damage your paint.
3M Stripe Remover Wheel
Amazon.com: 3M Stripe Off Wheel 07498, 4 in x 5/8 in, w/Hardware - 7498AM: Home Improvement