I turned the bigger one into a key ring by attaching a brass plate to the back of it.
http://i.imgur.com/xk2ylCf.jpg
http://i.imgur.com/EIjLdGZ.jpg
I've concluded that the time taken to carve a model, cut up scrap aluminium, mixing sand, casting, clean up, detail, polishing and attaching back-plate/sizing finger diameter etc is far too long. I know there are ways to shave time, but it's really not worth it to do by hand.
Back to the suit.
SB.