Also, if you using Bare Metal Foil or some other masking agent, the Future helps protect against any left over adhesive residue - just take it off with GooGone or something like that. The Future keeps the canopy nice and clear.
BTW, to remove future from a canopy (or anything else) - just soak overnight in Windex or other ammonia/water solution (but watch the fumes).
And if you ever get a 'buff' mark on the canopy and cant polish it away, try dipping into future as well.
On the bench: Academy 1/72 B-17G 'Blue Hen Chick'; 1/48 Tamiya Mustang III; Kitty Hawk 1/32 P-39.
Completed: 1/48 Tamiya P-51D Mustang - 'Show Bird', 1/32 Dragon P-51D Flying Tigers 'What if'; 1/32 Tamiya P-51D Big Beautiful Doll
Group build:1/48 Tamiya Mustang III; 1/48 Tamiya P-51D Show Bird