Here's an old timey metal marine that I converted long ago for the Demonhunters army.
I did some green stuff work on the lower legs, the chest and the helmet. A different sword was added, and some purity seals. I also added a storm bolter.
He is also here:
And, as a comparison, I shot the figure again using one of the other Hangar 18 backdrops.
It really does make quite a difference! Wait until you see the Krios with different backdrops.