I've done the steps that Bob K mentions below a little differently....

Once the tape is in place and the mylar is perfectly positioned on top of the tape (protective plastic still in place on the tape) I don't flip up the mylar. I leave a 3-6" long strip of the protective film sticking out from under the right or left end of the mylar and I pull the protective film out from under the mylar while carefully holding the mylar in position. Easy enough to practice this on a short segment first, but it avoids anything moving or going "off" when you try to flip a long section of mylar back down onto the, now exposed, adhesive. Just carefully pull a few inches of the protective film out from under the mylar at a time while holding everything stable.


* With the mylar tagged in place, flip the mylar forward over the tags, using the tags as hinges. Then tag the mylar down in this position with a few more tags of tape.
* Peel the protective strip from the adhesion tape.

--Bob K.