. Fuel-Proof, Water Based Formula For Easy Clean-Ups. Many Colors For Painting Slot and R/C Car Bodies, Plastic Models, Boats, Scenery, Signs and Ceramics. Also safe for foam. It Remains Flexible and Resists Cracking, Chipping and Impact Damage. Can Be Used With Any Air-Brush That Delivers Over 40 to 70 psi, and Uses A MEDIUM Tip