From my experience I would say the Windex route is your best bet. It will give you just about unlimited working time and will give you the best results since you can work all the bubbles out. Trim solvent works great if the covering is only overlapping by a quarter inch or less. Any more than that and it tends to trap the gasses let off by the solvent/glue and you end up with bubbles. Trim solvent will also stick almost immediately so if you don't get the piece into perfect position on the first try you may be in for some trouble.

Covering applied with Windex does tend to peel off easier than that applied with heat or trim solvent so be sure to go over the edges with an iron or possibly trim solvent to make sure the edges don't start to peel back after a few flights.