I made this for myself to get the damage correct on the left Gauntlet. I traced over a high res image to get the basic shape down. I have a vinyl cutter so i just cut it out in vinyl to use as a mask, stuck it on, painted and removed it i think it came out pretty good. You will need to do a little dry brushing on some of the edges it you want to get it more natural looking, but this is a good start. You also may need to scale it to your particular gauntlet. I made this for the 2010 MOW's and i had to scale it a bit to get it the size i wanted..figured id share in case anyone wanted this. I may do one for the grey damage as well. On the gauntlet pictured, i just did the grey damage by eye/hand.
Here is my gauntlet:
Here is the high res pic close up (and upsidedown)of the gauntlet:
Here is the full image: