Sakura Solid Paint markers are the tough markers for tough jobs. They are solidified paint in a marker stick. It marks through oil, grease, rust, mud, snow-inside or outside. Dries within minutes, and is permanent once dry. Solid Markers won't fade or wash off like chalk. The special "stay fresh" twist mechanism keeps paint fresh and ready to use. Ideal for use on wood, cloth & canvas, plastic, steel & iron, rubber, cardboard, glass, fiberglass & concrete. Can be trimmed with knife for smaller marks. These markers can be washed off with rubbing alcohol or any alcohol based cleaner and a scraper. Currently available in Glow-in-the-Dark!