It looks like they just used a braid long enough to wrap around your wrist and then this technique to attach the ball chains. Just do two chains on opposite sides of the braid instead of just the one the tutorial shows. To get the crossing over effect just put the thread OVER the first bead then UNDER the opposite bead, and vice verse. Hope this helps, Good luck!
http://honestlywtf.com/diy/diy-wrap-bracelet/
Posts by Felecity W.
Try the paper mache'/ plaster of paris covered muslin strips you can buy in the craft store. If you molded the plaster strips to his form, when they dried you would be able to modify and spray paint the final project. If you could find screws to drill through the plaster it would make it look more realistic. Make sure you use ALOT of Vaseline before you apply the plaster strips taking them off hurts otherwise.
This may help you with the chain mail!
http://tinysparklythings.blogspot.com/2009/11/diy-chain-mail-get-ready-to-be-battle.html