Safe on many surfaces, this product may be used on restroom walls, trucks, buses, public buildings, and sidewalks. This product penetrates and removes spray paints, scuff marks, marker, ink, crayon, and other solvent-based marks and stains. Application: Graffiti Remover; Applicable Material: Buses; Buildings; Restroom Walls; Sidewalks; Trucks; Chemical Compound: Acetone; Dirt Types: Crayon; Ink; Marker; Scuffs; Solvent-Based Stains; Spray Paint.