Sharpie 63601 Uni-Paint PX-20 Oil-Based Medium Point Marker, Black, 1-Pack Marks opaque & glossy on virtually any surface: glass, metal, wood, rubber, stone, plastic, paper, vinyl, leather, canvas, & more Permanent & quick drying ink formula. Fade, water & abrasion-resistant. Ink is weatherproof, fadeproof & acid free. Opaque oil-based valve action paint marker