Well, there might have to be a space.. or a different kind of angle there, I think the insides of the gaunts would have to be modified so they would work. When I get to that area of my project I will play around with it
Wearability is always a concern. If you can't wear them without them falling apart, then there is no point to getting them. I'd go hinges, but those can be added.
A few good questions to ask if you need them or not is how often do you troop, what's the weather like, and what do you do in costume. If you troop a lot and make rapid moves, I'd suggest hinges. I've done quite a bit of trooping, and unfortunately I have had far too many instances of my gauntlets coming off and sustaining serious damage from impacting the ground. I'm getting close to going with hinges.
If you don't plan on trooping too much, velcro is a good choice.
i have been wondering about this for a while now also, does anyone have pics or a good tutorial for attaching hinges of magnets to fiberglass gauntles?