Vallejo Primers are airbrush-ready and brush-ready primary coats that can be used directly or mixed with other Vallejo paints and auxiliary products. We recommend avoiding mixing these Surface Primers with alcohol and/or solvents due to the unique resin in the formula, which is added to achieve the tough finish. Designed for the coverage of plastic, brass, resin and other hobby surfaces. Surface Primer may be cleaned using water. For airbrush cleaning it is recommended to use Vallejo Airbrush Cleaner. Non toxic and low odour.