Bare Brick, Stone & Masonry Graffiti Remover (BBSM) is a highly effective, economical, and biodegradable remover for all types of spray can paints, oil, latex, and water-based paint overspray. It is also effective on paint spill stains, grease, grime, smoke, and oil stains, as well as other marks on porous brick, stone, and concrete surfaces, including cinder block, split face block, and exposed aggregate.