Crash, You might have a look at latex paint info on [link]http://www.vaillyaviation.com[/link]. He really spells it out in detail. There is a learning curve with latex, but for me, I think it's the ticket. As discussed earlier, Home Depot can mix any color you want at about $3 per sample container. Cheap, unlimited color choice, and no smell! On my current build, I'm experimenting with fuel proofing clear coats. You can mist Lustercote directly over latex with mixed results. If you put it on too heavy, it will wrinkle the latex. My next experiment was with Minwax Polycrylic over latex. The Polyc does NOT react with the latex. Once that was dry, I sprayed the Polyc coated parts with Lustercote for fuel proofing. Works great! The Polyc acts as a barrier between the latex and the Lustercote. This may be the Holy Grail I was looking for.
Also, some people use gloss or semi-gloss latex. I use flat because some sample colors only come in flat and it sands much easier than gloss latex. Hope this helps.