DecoColor Opaque Paint markers are great for writing and drawing on non-coated surfaces such as glass, paper, wood, clay, porcelain, stone, metal and mirrors. The paint is an opaque oil-based paint with xylene. It is acid free, lightfast, weatherproof and pigmented. Great for crafting, home and office use, signage, posters, and outdoor projects. Colors can be blended and are easily removed with turpentine.