I've used the Minwax clears in oil-based and water-based. They hold up fine on gassers, probably because there is very little exhaust residue.
I'm not surprised that glow fuel attacks it. There aren't that many paints that hold up to glow fuel, especially with higher nitro content. That's one of the many reasons I switched over entirely to gas-powered planes. No mess, no fuss, and you can use almost any kind of paint.