You can try scraping it off with a putty knife. If you happen to gouge the drywall in the process, use drywall mud over the spot, smooth it over with a putty knife. After it dries, try sanding it. If it is still not flat, scrape on a bit more drywall, allow to dry and sand again.
Use Goof Off to soften the glue, then try to rub it off with a rag.
Use Goo Gone it will take off the reside without marring the finish.
Keep it damp for a half hour or so and wipe it off after it softens. If it is a small spot, moisten the pad of a bandaid and stick it to the wall over the spot. Wipe, don't scrub.
Foam and glue. Basically it's a real mess to get to the metal underneath but it is painted to the body so if you can find a solvent that will take the glue off without damaging the paint, then you're set.
If it's drywall almost nothing will remove it without marring the wall. Try small bits with different solvents.
Goo Gone or Goof Off will both do this easily.
Goof Off usually works for this.
You scrape away the original glue and re-glue it with a vinyl glue, then stick it o the wall. Don't let water run or spray over it for at least 2 days, then grout it.
Yes, once the fixture is taken off the wall and spray painted they will look as good as new.
Rub around the base of it with Goof Off, then grip it with pliers and pull
I tried to pull the poster off the wall, but it had been attached to the wall with hot glue, and wouldn't budge.
Yes, prise it off slowly with 2 wood chisels.