Use a Woodpecker on the sheeting before applying the covering and it will reduce (reduce, not eliminate) the number and size of bubbles on the surface you are covering. Also, you might try the covering from Value Hobby or Hobby King. It is the same covering and comes in five meter rolls for less $$$ than either MonoKote or UltraCote. It works very well and doesn't have a tendency to sag in the sun. Really good stuff.