Thanks again for the suggestion.
Wire hangers would certainly be sturdy, but I wonder if it would have to be completely sealed. Their strength would be excellent. I'm not looking to make "poseable" pieces.
Unfortunately I don't happen to have any wire hangers.
I've time to figure out what would be best to use. I have a couple ideas for pieces that would require a very good armature, but I am not likely to be making them in the near future.