Schmincke AERO COLOR Fluid Acrylic is a low viscosity, liquid acrylic formula. It is the least viscous product in the Schmincke acrylic range. AERO COLOR can be applied by spray gun, brush, re-touching pen, or dipping brush. It is possible to use the AERO colours pure or to spray them after they have been thinned with water. AERO COLOR Fluid Acrylic dries waterproof and lightfast.AERO COLOR Professional can be used on papers and cardboards as well as non-absorbent surfaces such as film, hard plastics, canvas, and (after preliminary treatment) metal.