FASTHINNER is formulated to properly thin and improve the flow of FASKOLOR paint for airbrushing. It is the key to finer lines, detail and using lower air pressure, especially with gravity feed airbrushes. It speeds up dying time and prevents excessive over spray when thinning paint, without loosing color pigment. Mix in a 3:1 ratio (paint/thinner) up to 50% for best results. 2 oz bottle