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The canvas needs to be softened. New kanayama canvas can damage the ecge.

The kanayama website has directions for softening the canvas.

I beat mine with the flat side of a meat tenderizer.

They are great strops.
If you find it getting really slick wipe it down with a damp rag. There are instructions on their web site.

I have rubbed in some Neatsfoot oil. Only a couple of drops...