Wheels and Tracks Set Vallejo Model Air 71.213 Matt acrylic colors, water-based and especially formulated for airbrushing. The Model Air color range contains the most complete selection of the military colors used in recent history, including the colors of WWI, WWII and up to the present. Each color is based on extensive research by our experts of the existing and previous military references so as to offer the modeler the highest possible historical accuracy. Model Air is used directly or diluted with Vallejo Airbrush Thinner or Flow Improver. It is recommended to first prime the surface, and then apply Model Air in several layers. The colors dry very rapidly and form a homogenous paint film of extraordinary resistance while preserving even the smallest detail of the model. For airbrushing these colors, the compressor air pressure is recommended at 15 – 20 PSI or 0.5 to 1 kg. Model Air can of course also be applied with a brush. For correct airbrush maintenance we recommend using the Vallejo Airbrush Cleaner.Safety: Model Air is not flammable, and does not contain solvents. Please see also certified safety information of the product on the Safety page.Packaging: Model Air is presented in bottles of 17 ml./0.57 fl.oz. with eyedropper. This packaging prevents the paint from evaporating and drying in the container, so that It can be used in minimal quantities and preserved for a long time.