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Comment by Dennis Hibar on May 7, 2019 at 14:45

Thanks Ron.  JD likes to French grey his O1 blades.  It acts, much like a patina, to inhibit rust ... to an extent.  Not sure of his exact method.  But, most likely he applies a coating of phosphoric acid in some form or another (Brownell's blue stripper, naval jelly, ... or maybe even some type of toilet bowel cleaner that contains phosphoric acid).  Certainly looks nice, though!!

Here are a couple more pics:

Comment by Ron Cooper on May 7, 2019 at 11:19

Wow, Dennis! I love the way that knife looks! I'm not familiar with the "French grey" treatment, per se. But I love the funky effect it gives to that knife...especially married to those horn scales! That's a half a pound of eclectic beauty! Suh-weet!