Goo Gone Graffiti Remover is surface safe and works on many types of surfaces such as concrete, brick, street signs, glass, metal or aluminum, stainless steel, fiberglass, and stucco. Goo Gone Graffiti Remover removes dry paint, wet paint, ink, and marker. Formulated to penetrate and remove even the toughest baked-on exterior problems. Goo Gone is surface safe with a professional grade formula.