RE: monokote hinges
The ultracote is not an unmixed blessing either. I can't comment as to how well ultrcote adheres to monokote, but I can say that ultracote needs to be wrapped around an edge before you put the heat gun on it to shrink out wrinkles, otherwise it will creep at the edges, enough to be a real problem. Monokote in my experience, once stuck down, resists creeping better than ultracote. So if you wanted to lay strips of ultracote on top of a monokote covered model in order to make the hinges, I don't think I'd recommend it. The only way I would do an ulltracote hinge would be to use a single piece running all the way across the chord, and turned over both leading and trailing edges.