Alclad II ALC109 Polished Brass 1oz Features: Pre-thinned for airbrush application, Dries in ten minutes, No sealer required, and Does not lift when masked. To obtain a great finish: The surfaces to be painted must be thoroughly clean and free from dust and fingerprints, Airbrush at 12-15 psi, Airbrush 2-3 inches away from the model, and Buffing is not necessary but tonal variation can be made by polishing selected panels with Micromesh.