We call it The Unpolished Dark Graphite Finish.
It’s made by the formation of the oil oxide film on the extremely hot metal surface.
Armor has a brutal “raw” look. It’s not a classic darkening/blackening.
This dark graphite color is not homogeneous, metal gets “live” variable shades.
The unpolished dark graphite surface of armor changes by the times of use.
Mechanical impacts transform it revealing the individual personality of the armor’s owner.
You can choose the total dark look or mix unpolished dark graphite armor with the regular finish armor.
Bear in mind the unpolished dark graphite finish option can’t be applied to armor made from titanium or stainless steel.