DIFFICULT KNIVES TO SHARPEN

Just a few knives I've convex sharpened of late with have proved
to be difficult for one reason or another.
These include Spyderco Delica (ZDP189), Fallkniven PC (LAM CoS) ,rough rider toothpick (44O), Mora Kansbol (12c27)

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What a bloody great video. Instant subscribe. I'm finding it hard to sharpen my Falkniven Jarl in 3g, its a fat convex but I'll keep on. Fairly experienced at a medium grade level but it's the one that confounds me!