Vallejo Model Air Sky Blue acrylic airbrush paint in 17 ml bottles. Water-based matte acrylic engineered for airbrush application. The Model Air series provides an extensive library of military colors representing WWI, WWII, and modern eras. All formulations are grounded in expert research of authentic military specifications and historical paint references. May be used straight or diluted with Vallejo Airbrush Thinner or Flow Improver. Prime the surface and apply in multiple thin layers for best results. Colors cure rapidly to form an even, hard-wearing coating that preserves fine surface detail. Airbrush at 15–20 PSI (0.5–1 kg) pressure. Compatible with brush application. Vallejo Airbrush Cleaner recommended for tool maintenance. Flammable-free, solvent-free formulation. Packaged in 17 ml (0.57 fl oz) bottles with eyedropper.