From a Chemistry point of view, the polymer coating isn't fully cooked for quite some time as Pat notes. That matters little for electrics. But if you use high nitro glow fuel or to a lesser extent, gasoline, it's not a good idea to spill fuel on your finish since it has not cured enough to produce a fuel proof surface. That comes with aging .... A couple weeks at least is often adequate. If you use liquid fuels and spill them on the finish, wipe the spill as soon as possible.
Exactly...This is what House of Kolor has to say about their clear:
Based upon weather conditions, number of coats, solvent speed, and flash time between coats, etc., it is not unusual for the Klear to remain soft for extended periods of time. This does not meanthe finish is uncured; it indicates the finish is holding solvents and will need additional time to fully harden.
Being a canalized product can create a hard skin, if you will, but solvents are still trapped and need to be released. This is why clear coat can weigh significantly less after cooking in the sun over time.