Hi, KV,
It holds up pretty well to handling, and can be easily reapplied. I haven't seen it flake off or otherwise wear. As an acrylic, it's pretty tough.
In modeling applications, Future is used to make clear parts look clearer. Dipping them deposits a thin film on their surface, providing a smooth surface by filling in the tiny imperfections from handling. In fact, I've seen aircraft canopies that were damaged and had to be sanded smooth, and were as good as new, with the sealer coat of Future.
It's also used as an undercoat for decals, for the same reason. It provides a smooth surface for the decal to settle onto, eliminating "silvering" in decal film, caused by air trapped in tiny pits on the surface. And as an undercoat, it has to stand up to applications of solvents used to help decals settle down on the surface, and also, dullcoating lacquers, applied after that step.
I guess, too, since it's made for coating floors and giving a nice shine, even with a lot of traffic, it's formulated to be tough.
I find that coating a figure with Future can also enhance the color of the paint underneath. I have a Prussian officer from the SYW, for example, whose coat took on a richer or deeper hue, once I brushed the acrylic over it.
It can be airbrushed, too, either straight, or cut with distilled water or isopropyl alcohol, though I'm not live yet with my airbrush, so I haven't tried that yet.
Prost!
Brad