Sharpie Paint Marker Pen Oil Base Bold Point, Blue Box of 6 Sharpie markers are great for writing on all materials including oily metals, glass, and wood Permanent oil-based, opaque valve-action paint marker Quick drying ink marks opaque and glossy on light or dark surfaces Fade, water and abrasion resistant for a long lasting durable mark Marks on virtually any surface: metal, pottery, wood, rubber, glass, plastic, stone, etc.