Liquid Mask is used to reserve areas which are to remain unpainted, especially in airbrush techniques. The product forms a protective film on the area which the artists does not want to paint. Once the work is dry, liquid mask is rubbed off revealing the unpainted area. Use with brush. Shake lightly and test on surface before use. Do not leave applied for a long time. To remove, peel or rub carefully once dry. Keep from freezing.