Well five years ago the black covering would bubble and peal do to the heat of the sun, usually if it was on top of the plane, from my experience with the EF Yak in my avitar it didnt. I had black stipes on the bottom of my plane that was ultracote or monocote and sometimes I would have to iron it, but my friends planes had to iron the covering down before and after they came home from flying. One of my friends Horizon hobby 102 extra's covering started pealing while in flight on the wing and that was blue. Flappin in the wind. I'm not sure if they have new monocote that alleviates that. It's not a major problem if you dont mind ironing your plane which should be frequently done anyways. Just be careful when ironing wings, you dont want to iron one side too tight before the other side. That can cause some issues, sometimes, not always.
Nice harriers with your jet. I dont see rudder, does it have vector thrust on your motor?