Snake, Primer - I've personally used Tamiya grey and white, Duplicolor, and Testors as primers under that paint. As Joe mentioned above, the 1oz bottle is good enough for a small body, the 2oz (which is what most of the paints are in) can cover 2 to 3 bodies. I shoot at 24psi. As for lasting over time, I have paint that I bought 2 years ago and are still good. I shake the bottle for 30-40 seconds after i hear the bb's inside making noise. He has gloss paints and base/clear. Testors lacquer and Tamiya are what I have used for the most part. Any other ?'s, ask away.