Uni-Paint oil based, valve-action paint marker marks opaque and glossy on light or dark surfaces. Use it on virtually any surface: glass, metal, wood, rubber, stone, plastic, paper, vinyl, leather, canvas and more. Comes in a variety of tip sizes. For your next project keep the Uni-Paint PX-20 Oil Base 6 color set handy. It contains Black, Red, Blue, Green, Yellow and White.