Stormson, if you worked with wood as a carpenter, you can use a metal file. Most of it is file work anyway. If you have a metal vise, all the better as it will hold the workpiece steady while you file away. If you don't, get a handvise.
It's not as steady (because your hand isn't as rock solid as a bench mounted vise), but it'll make it faster than holding it with your non-dominant hand.
Dykem is a metal dye. It is used to mark the workpiece so you know when to stop cutting. As suggested, a sharpie may also be used. Dykem is removable with acetone.
Here's how I would do it.
1) locate a piece of tool steel the same thickness as the hand.
2) photocopy the hand.
3) cut out the photocopy and glue it onto the steel.
4) mark the hole where the pivot pin is.
5) drill out the hole.
6) Use a saw or mill file, cut away most of the extra steel from the workpiece.
7) Use a finer tooth file to dimension. Make sure it is longer on the top of the hand and in the second step. The first one begins the rotation of the cylinder and the second completes it.
8) fit and then polish to high shiny finish.
9) Use a torch to harden to cherry red and quench with oil.
10) polish to high shiny finish
11) Use a torch and heat to a straw color. DONE.