The Sharpie Paint Marker SAN35531 is a valve-action paint marker that delivers an opaque and glossy effect on both light and dark surfaces. This permanent oil-based marker can mark on virtually any surface, including metal, pottery, wood, rubber, glass, plastic, and stone. It features xylene-free paint that is fade-resistant, water-resistant, and abrasion-resistant, allowing for easy overlay of colors and other mediums. Certified AP nontoxic for safe use.