You can also apply the white vinegar using a paintbrush.
Though you can use WD-40 in addition to white vinegar if the vinegar didn’t work well, WD-40 is primarily used as an alternative to other adhesive removers.
Goo Gone is a popular option for adhesive removers that works well on bumper stickers.
Use an old credit card instead of a plastic putty knife, if desired. Spray specific stuck spots to help loosen them up.
If you’re using a damp rag, dip it in lukewarm water before wringing it out to remove excess water.
Holding the hair dryer too close to the bumper sticker may cause the paint to melt. If you choose to use a heat gun (which is hotter than a hair dryer), hold it roughly 1 foot (0. 30 m) away from the sticker for 1-3 seconds until the sticker bubbles slightly. Heat the bumper sticker using a hair dryer for about a minute—if you see the edges of the sticker starting to lift, it’s ready.
Though it will depend on the size of your bumper sticker, 2–3 cups (470–710 ml) of water should work well. You can also dip a rag in boiled water and hold the rag on the sticker for a few minutes, though it’s important to wear gloves or an oven mitt to ensure you don’t burn yourself.
Plastic putty knives work well, and you can get them from any big box, home improvement, or art store. Don’t worry if the sticker rips while you’re peeling it off—just continue using your heat method and slowly scraping from the edges first. Continue using the scraper to peel up the sticker until it’s completely removed. Avoid pulling the bumper sticker directly up as you remove it to avoid damaging the surface.
You can also use a detailing spray or other car cleaner instead of rubbing alcohol if desired.
