A wet install with grey calendered vinyl should be a piece of cake on this as long as you get a wide enough roll to cut them as single panels. We’re doing about thirty 36x80” ish assorted sized
windows tomorrow and we’re going on the outside with printer vinyl but with a little practice this is way easier than air release vinyl (and cheaper!)
-with a wet apply you pretty much need the panels cut exactly to size or ideally 1/8” or so smaller in both w and h. If it overlaps the window gaskets you’ll end up with a pocket of liquid there and there’s no good way to perfectly stick it down although often even if you’re a little off on this it all looks fine.
-thicker is easier but I would probably just go with 3.X mil whatever and you’ll be fine. If you’re really worried you could laminate someone over the thinner vinyl to bump it to 6mil ish and it’ll install even easier.
-again overkill but you could print grey on clear, lam over it with white (or printed vinyl) and cut. These thick panels will go on like a breeze if they are cut core
-bring towels to place along the floor
-I like regular dawn in water as it tacks up slower than rapid-tack and is cheaper as well. We use those 2 gallon pump sprayers or big spray bottle
-felt edge 6” squeegees are your friend, preferably stiff Teflon ones
You could do air release but I personally can’t see any benefit and it’s definitely slower