Okay, my method is similar to what has been shown, but I use "electric fence" wire. (cheap but you buy it in bulk)
I make the armature like Buck and glue it into place with hot glue. I then sandwich the wire and use hot glue around the inside near the edge which provides support at the outside, without "memory". I then used contact cement to "pinch" the edges together which rounds the hand off a bit.
I admit, my technique is a modification of Buck's technique from the Tumbles project. (See, I was paying attention.) The only real difference is the hot glue replacing the wire on the outside and the pinching. Like Wes said, trial and error and this seems to work well, so glean what you can from this forum and adapt it to fit your needs.