Create a mixture of 1 tablespoon powdered oxygen bleach and 3 cups warm water. Stir the ingredients until the powder is completely dissolved.
Dampen a soft cloth with soapy water and dab at the stain. If the stain is not completely lifted, move onto the next step.
Wet a cotton ball with natural nail polish remover. These removers are derived from natural ingredients, including corn and soybeans, and do not contain acetone or ethyl acetate, which emit strong chemical odors.
Dab at the nail polish with the natural polish remover. Do not rub the wall to prevent lifting the paint or damaging the wallpaper.
Wipe away the nail polish remover with a damp cloth.