The Solid Marker marks through oil, grease, rust, mud and snow on both rough and smooth surfaces. The ink dries quickly and does not fade. The Solid Marker even marks and dries under water! The special twist mechanism in the Solid Marker keeps the paint fresh and ready to use. Ideal for use on wood, plastic, steel and iron, fabric, rubber, cardboard, glass, fibreglass and concrete. Due to its limitless applications, the Solid Marker is widely used in the construction industry, by welders, in manufacturing, in forestry, for pipelines, on assembly lines, in the automotive tires sector, and for HVAC (heating, ventilation, air conditioning) and plumbing systems. Meths, turps or white spirit-based cleaning agents will remove the ink from non-porous surfaces.