Methylene Chloride. Methylene chloride is the principal ingredient in most paint removers and in heavy-duty brush cleaners. Sometimes it is combined with other ingredients and sold as "graffiti remover." It is effective in removing all finishes, but it too attacks and softens plastics.
Does Goo Gone remove spray paint?
Goo Gone Graffiti Remover is specifically formulated to loosen spray paint and make it easy to wash away. It's safe to use on brick, concrete or stucco and works on a variety of spray paint styles.