U.S. Art Supply Gray Surface Primer Airbrush Paint, 8 oz - Acrylic Primer Paint, Ready-To-Spray, Water-Based Acrylic Polyurethane for Miniatures, Models, Plastic, Metal, Wood, Canvas, 3D Prints8 Ounce Bottle of U. S. Art Supply Gray Surface Primer Airbrush Paint. Ready to spray professional grade water based acrylic polyurethane gray multi surface primer airbrush paint that is suitable for use on most types of painting media surfaces and all skill levels of artists. A premium self leveling primer that is ideal for priming surfaces before painting. It is easy to apply to surfaces, provides excellent adhesion, and dries to a durable, hard