American vehicles in WWII used as paint the Olive Drab. This set helps us paint with modulation effects on these U.S. vehicles, obtaining light and shadow tones with subtle variations but not changing this special color olive drab. The easiest and quickest way to make the modulation in this tone. These are acrylic paints so you can thin with water and can be used in your airbrush. You only need to shake them well.