Check out the application instructions below (YouTube):
Basically involves using soapy water so you can slide the tape around and squeegee out the bubbles. Sounds weird, but I can testify that it's real simple and works like a charm. (I can remember using this technique decades ago on some long forgotten elec
tronics project that needed a smooth application of a big piece of tape.) The only drawback is you have to wait for the water to dry. I keep a second aluminum plate on hand (they're cheap), so I can swap to a new plate, keep printing, and reapply later.