Interesting comment here on Minwax Polyurethane. I'm presently finishing a planeusingRust-Oleum Painter's Touch. I tried applying Lusterkote Clear over the rust-oleum, but it crazed the finish in a matter of seconds. I'mtrying Klasskote Clear epoxy next. I'm going to have to test the Minwax Polyurethane for fuel proofing.
Jim
ORIGINAL: dmccormick001
I used it to paint over Monokote, per Top Flite's instructions, on a P-39 Airacobra I built. Then I applied panel lines, custom decals, and top-coated it with flat clear LusterCrap, err.. Lusterkote. It looked great. After a few months, one or the other began to turn black, like mildew or mold was forming under the surface. I tried everything to restore the colors and remove the black funk, but nothing worked. I finally re-painted using Rust-oleum paints, and top-coated it again with Minwax satin polyurethane. No more problems.
I've used polyurethane to finish field boxes that had no other stain or paint on them, just clear polyurethane. It is absolutely unaffected by the fuel, even around the area where my fuel jug rests, which stays damp with spilled fuel. Nothing short of acetone will affect it.
I'll not use Lusterkote again on anything. Other brands of paint are better and cheaper. Only advantage is the color-matching ability to Monkote, but you can get other paints custom mixed to match.