Assuming your model has duraluminum gear, that paint might need a primer to stick to metal; or at least the metal should be sanded or otherwise "roughed up" before spraying.

There was a pretty lengthy thread about this stuff, before the "upgrade", that was mainly complaints of one sort or another. I used it on the canopy frame of my Contender, and so far it is sticking well to the butyrate plastic, with no issues.

While methanol is a solvent, the real villain that eats finishes is the nitromethane in raw fuel. Spills, leaks, etc., can cause all sorts of grief. Hot exhaust is another problem. Perhaps you have the exhaust directed onto the painted parts? That's always something to avoid.

There will always be issues with one-part (as opposed to two part- catalyzed- auto type paints) rattle can spray paint. Still, it survives because it is convenient. The only time I break out the spray gear is for a helicopter canopy; it is just too much of a hassle to set up and then clean for incidental plank goodies.

This is one of those topics that has a BUNCH of different ideas by modelers. Many swear by Krylon; the one time I tried it was a disaster.

I just hope that Lanier gets their feces consolidated with this UltraPaint. LusterKote needs some competition...

One suggestion that I intend to fully explore, next time I need some, is the one about having a paint store mix and match a two-part paint and put it in a spray can. You have to use it right away, and it costs close to twice what a regular can of "hobby" paint does, but if the finished product is anywhere close to what you get from mixing and spraying with a gun, then it will be worth the added expense.

Steve