This set of 8 colors in a new line AIR SERIES specially designed and formulated to paint British planes in WWII, it is the second in a series of sets specific colors. Exact colors carefully studied by historicians and formulated to exactly represent the colors of the time. Each box paint references for different models. These acrylic paints can be used with both brush and airbrush. They are water soluble which prevents odors and aggressive solvents need.