Removing Bumper Stickers
STEP 1: Spray the sticker with a lubricant such as WD-40 or gasoline (which is not as safe), and try to peel it off. If this doesn’t work, proceed to step 2.
STEP 2: Soften the adhesive with heat from a blow dryer.
STEP 3: Start to peel off a corner of the sticker while continuing to apply heat, or gently scrape off the sticker with a rubber spatula or a putty knife with its metal blade wrapped in duct tape. Do not use a razor blade; it can scratch paint and bumpers.
STEP 4: Wipe the remains of the sticker away with a soft, lint-free rag dampened with rubbing alcohol.
STEP 5: Buff the bumper or panel with a polishing compound and a fresh coat of wax to complete the job.