Having recently become airbrush-savvy, I could not resist redoing my Panzer VI to a higher standard.
Having tried unsuccessfully with Vallejo Air Color, I reverted to what I know, and used the appropriate tones from Tamiya. I cannot say that they are better than the Vallejo paints in an airbrush, but having learned on them, I find them easier to get predictable results with. The tanks start out with a Dark Yellow basecoat, then the camouflage of Olive Drab and Nato Brown are applied over top. Then a very thinned out layer of dark yellow filters the colors back together. Some shades and filters of various browns and blacks went thinly over top before the final details were picked out with a brush.