I know a lot of people use it as a gloss coat (covering entire model, to prepare for decals and weathering), with great results. I tried it a couple times and I hated it. I've tried dipping canopies in it, and have had poor results...again, other do it with great results.
I have only two applications for the stuff.
1. "Painting" it on over small clear parts, after I spray a final flat coat (nav lights, landing lights)
2. I use enamel paints and I spray a lacquer gloss for decals/weathering. I will brush on just a little "Future" just where the decal goes and just prior to placing the decal. I use it instead of decal setting solution. Dab it on, place decal, dab away excess with paper towel...allow to sit for a few, then hit the decal with a solvent to snuggle the decal in to details (I use micro-sol). Serves more as an extra bit of adhesive and drastically reduces the risk of the decal "silvering". For this application...I love the stuff!