Been reminded of this thread a few times watching 1ofwisdoms' latest customs. Did this one a week or to back. Actually think it turned out well and one of my better custom paints.
Much of the work was done on the helmet. Just washed out her jacket in all black. Wanted her to resemble more of the Swap Force dark stealth elf.
Here is a link to the youtube video for a good look - https://youtu.be/xe-eZ5W-Rws
What do you think?