Createx Colors Illustration Black, White & 4020 Reducer Set, 4 oz 4020 Automotive Reducer is a specialty reducer for humid or cold conditions. Makes water-based paint spray dry like solvent-based paint. Colors "melt in" when reduced with 4020 Automotive Reducer for exceptionally soft highlights & fades without a textured or grainy appearance. 4020 Reducer cures colors hard like automotive paint, for soft-erasing use 4012 High Performance Reducer. Illustration White & Black are low viscosity, transparent paints that dry to a matte finsh. Compatible with any water-based and solvent based clear. Illustration Colors are Createx Colors' premier airbrush paint type. Theyre suitable for most any surface including aluminum, metal, plastics, glass & more. For the ultimate water-based auto paint, mix also with 4030 Intercoat Clear (not included).