Originally Posted by smccolp

The hard coating is actually type 3 anodizing and anodizing applies mainly to aluminum but is also used on titanium. Type 3 actually forms a hardened layer approx. 1.5 to 3 thousands of an inch thick (into and on top of the material) and any reputable anodizing shop can do it in any color anodizing. Try contacting a company called Precision Anodizing in Oklahoma City. Sorry I dont have a contact number.
Sean