I posted this last night but it didn't load, if you want to use a water based fuel proof paint Nelsons has colors in catalyzed paints that are water clean up and fuel proof.

www.warbirdcolors.com also sell a water based material that's fuel proof I read that Chuck is having some Mfg issues on some products, but shoot him a email he might be able to accommodate you on a color you need.

as for quantity for the blue your going to need at least a pint since Dk.Blue is a primary color it takes a few more coats to get good coverage, I recommend using a grey primer under the blue it helps with that., so you don't load the plane up with paint.

if your going to go with regular house paint and clear coat it then your stuck with a quart I prefer to use the best I can get a Sherwin Williams, or Benjamin Moore brand but some swear by Home depot, but my clear choice is WBColors