Minwax is NOT fuel proof. It turned to slime on my airplane with just the exhaust residue and raw fuel etches it badly if you don't get to it real quick.

If you want to save money, try the touch up cans of clear coat at the auto parts store - $3.49 for 8oz can. I haven't tried it yet, but I can vouch for the Minwax being a disaster, and its my next experiment. I also tried the Varathane Outdoor Gloss with bad results too.

Maybe the ones having good luck are the gassers.

PS - the Minwax is still prone to fingerprints 6 months later after being in the hot desert sun many times.