Minwax Polycrylic is definitely NOT fuelproof. I've used gallons of it on cabinetry and accidentally tested it. A single splash of cold 10% nitro immediately softens it.

Water-based Varathane Diamond Floor Finish (now owned by Rustoleum) IS fuelproof. I've also used gallons of it on shelving (it's much tougher, but not as good looking as Polycrylic) and also finished my oak engine test stand with it 8-10 years ago. Fuel has had NO effect on it.

Cabot's Water-Based Polyurethane also seems to be fuelproof. It survived on a test scrap, but I haven't much experience with it. I can get the Cabot stuff in quarts at my local big-box store, but can't find the Varathane in less than gallons.

Any of these should be allowed to cure a week or 2. Yes, I know, delayed gratification and all that.

-Dave