Hmm... depends on how nitpicky you want to be.
Obviously, you'll need to paint them with some leather paint. My only other concern would be if they are long enough to stay securely under the gauntlets, without constantly slipping out. Otherwise, yep, they'll work.
Now, if you want to get nit-picky - the stitch lines in the middle of the hand aren't correct. And the two stitch lines along the index finger are missing... There are seams along the sides which aren't canon either...
But again, 99% of anyone out there won't ever look at stuff like that. So if you think they'll do the job, and you can get them the color you want - I'd say go for it. You can always upgrade later if you decide to!