I put one of these Scothcal kits on about 3 years ago. It was the precut set that included 8 pieces. 1 piece for each fender, A-pillar, door edge guard, a piece for the top of the cab above the windshield and 1 piece for the top of the hood above the grill.
Took me about 2 1/2 hours to do it all. Required cleaning the truck first, then prepping the area by cleaning with alcohol wipes. Then a soapy spray is used to wet the truck and then the 3m material. A squeegee is then used to force the liquid out from under the film.
It has worked extremely well, not one rock has penetrated the film and most importantly it has not turned yellow. I have a white truck and it would be very noticeable, and I get quite a bit of high altitude sun.
The only snag is that it takes a little extra detailing when polishing the truck in that the paste will get trapped at the edges. It's just a little extra time to something along the film lines to clean out the residue.
ic