Yep this will be going on for a while. Well I spoke to a local friend of mine and he said he was able to re-use the film but i would not recommend it so once its on its on unless you JUST put it on and decide to move it or something. Yes its only sticky on one side while the other looks glossy like paint.
The blow dryer or heat gun is highly recomended so you can mold the film onto the curves of your rear tail lights. I usually start in the middle where its flat then move to the side curve part of the lights. On some applications you don't need the heat gun but for curves, you are going to need it.