OTR .901 is high-quality alcohol-based paint for multi-purpose use. This high-glossy super permanent paint has a highly opaque coverage thanks to strong enrichment with pigments. Developed for the On The Run SOULTIP Squeezer Marker Series, it also works perfectly with many other artist tools. For indoor & outdoor use. Works on walls, metal, canvas, mixed media, wood, plastic, glass, stone, leather, and many other surfaces. The OTR .901 can be used with any paintbrush, air brush, in mots pump action valve markers, or in any mop & squeeze marker etc.