Let me first say: Wow! Simply wow! This is THE best incarnation of HK I've seen anywhere. Your paint application skills are just impeccable.
How did you achieve the metallic sheen on his armor? Did you paint him the red-maroon color, then apply a light metallic drybrush? Or vice versa?
I typically go with the paint I want as my overall base color first, then apply dabs of or drybrush metallic colors and have been looking for how to achieve a better effect---more like yours actually---when I do armor and the like. Just curious how you attack something like this.
Again, a great figure!