I bought 6 bottles each of 76 and 78 to paint my ESB armor. However, with thinning, that pretty much doubles how much airbrush able liquid you get. All mixed together, thinned 1:1, it ends up equaling 24 pots. At 14 ml per pot, it's 336 ml, about 1 1/4 cups total. I had a ton of leftover paint, even after doing 2 coats of green.
you will easily get away with maybe 2 bottles of paint. Mixed with thinner, it effectively doubles how much liquid you have.