RE: fuel proof paint
which valspar did you test? it seems that on other threads re; fuel proof paints that different colors have differing resistance to nitro from no resistance whatsoever to seemingly "bulletproof".
if you tested the clear, which one? valspar has a gloss, a satin and a flat clear.
anyone familiar with the klascoat (sp?) sprayable 2 part epoxy finishing products? does their clear turn yellow as well?