Ages ago I had a Carbon V Trailmaster, which I eventually sold. Bought a Sanmai TM but that became a collection piece. I wanted a "User" TM. But my experience with the Carbon V TM, as well as several other CV knives was that they are stain and rust magnets. Yes I know, proper care will keep a carbon steel knife in good shape. But I tend to be extreme, either they are babied for collection or treated as garden tools in my garage. Looked around for a used Black coated one but could only find the made in China SK5 ones. So I decided to buy a new O1 steel TM and have it professionally cera koted. Reading up on all the posts it seemed to be the most rugged and durable of my options. My knife guy must have thought I wanted the knife blackened for "tactical" purposes, because he sharpened the swage. Which admittedly was already sharp straight from the box. My real purpose for the black treatment besides rust prevention, was so when I was using it in my backyard the kids next door wouldn't be yelling that the guy has a GIANT knife. Anyway, everything came out very well, although it isn't going to get "used" till next spring now because it just freaking snowed.