Body Double

I'm not exactly set on this idea, but I was thinking of creating the skeletal structure of an arm out of aluminim foil and maybe something else to maintain the shape of the arm. Then on top of it I might add some of the mucles and veins that'll add color to it. To make it "functional" I'm going to attempt to make it capable of gripping. I'm not set on the idea, but at the moment it seems okay to me. I may add something else to it or completely change the idea, I don't know.