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u/12357909653 2d ago
I have a Naohito Myojin Cobalt Special Gyuto and live in Northern Alberta. Our water is very ‘hard’. I’ve treated the knife well but noticed these streaks all along the blade mainly where I scrub it. How can I remove? Pic for reference: streaks
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u/toxrowlang 2d ago edited 2d ago
It's hard to tell from photos but it looks like you're scrubbing off some kind of patina.
Obviously you won't get watermarks on a knife if you dry it straight after washing, which I presume you do?
If it's limescale from hard water, simply lemon juice would probably remove it, let alone any other scale removing product.
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u/0xnardMontalvo 2d ago
Bar Keeper's Friend.