I don't know how some things just don't die...Rustoleum is reasonably fuelproof, EXCEPT THE CLEAR (also "specialty" colors: metallics, candies, etc.).
On the other hand, Larry, I use the Spar Varnish as an overcoat and have never had any problems with it. and, yes, the water-based urethane is in fact fuelproof too.
Someone told me common house paint is fuelproof...anyone know for sure? Oil-based, or latex?
On a side note: How's that SkyWriter flying for you, Ray?