Minwax Polycrylic is fuel RESISTANT to 15% nitro. You need to let it sit for about a week before exposing it to glow fuel. Then, as long as you do not let the residue sit on the finish for more than about 4 hours you will be OK. After about 6 hours the finish softens and you can feel it "dragging" when you go to clean it. Minwix Polycrylic DOES NOT YELLOW WITH AGE.

The oil base polyurethanes are as fuel proof as you can get without using an automotive paint or a 2 part epoxy paint. The oil base polyurethanes WILL YELLOW IN ABOUT 6 MONTHS. On colors the yellowing is hardly noticeable, but on white and other very light colors it is very noticeable.

I use the Minwax Polycrylic and have had excellent results with it as long as I stay within the guidelines as mentioned above.

If you are unsure use Lusterkote clear or Ultracote clear. I prefer to use the Ultracote as my experiences with Lusterkote have ranged from "spitting" (very common) to mislabled colors to totally not matching colors.

FWIW- Ultracote paints can be applied over automotive primer with no problems, where Lusterkote really needs their own primer for positive results.

Hope this helps.