I tried using hairspray, eye makeup remover, and toothpaste to remove
blue ink from a ball point pen that my son had written on our white
apartment walls. They made a little bit of progress, but over 50% of the
ink was still there.
So I used "Spray N Wash's" Stain stick. After
about 4 applications and wipe downs with paper towels, the whole stain is
gone.