I was commissioned to make a pair of Sinestro Corps gauntlets. I started by making a paper template and then cutting the shapes out of 3mm eva foam and gluing them together with super glue. When gluing on velcro to the inside edges, I held the foam in a bent position so that it would retain a bit of a curve when it dried. This way the ends continued the curvature of the rest of the gauntlets when closed, instead of pointing outwards in a “V” shape, as often happens otherwise if they are left completely flat. They were hand painted with acrylics.
The template is available here.