Gary, I called an old firend, Terry Worster on making hands, and he re-minded me of a method he and I have used in the past. It is a little involed in describing, but I will be working on a hand this weekend for a statue I am doing and I will send some photos to you via email.
Baically if you are doing a hand not grasping something, and if using sculpey, make a ball of sculpey larger than the hand and sculpt the hand on top of the ball. The hand can be semi curved, not flat, and sculpt the top half of the hand. Before you bake, chill the hand on the ball and after it chilled a while, cut away the excess ball of sculpey and bake. If the bottomof the hand is going to be exposed, add material to bottom half of hand and bake again. Both Terry and I both agree hands are one of the most difficult parts of a statue to due and when you have done a good pair, cast them in resign so you DON'T HAVE TO DO AGAIN.
Like I said , I will be working this weekend and hopefully will get some photos of this method. Statue is looking great, James.