Below we have a couple of links that.
Clean up live edge wood.
Work your way along the edge of the slab.
I ve talked with a few wood turners that specialize in live edge work and all seem to agree that the bark will come off at some point no matter what you do.
It won t come loose later scraping away that layer creates a slippery smooth edge with more rounded features.
Begin by removing a 6 8 section of bark starting at an end.
Scrape the fibers off with a nylon or wire brush.
The cambium layer the fibrous glue that connects the bark to the wood can add depth and character to the edge if you leave it.
The first thing to do is to begin sanding to a smooth touch using 120 grit paper.
If you work across it you may gouge the surface and leave marks.
There are lots of methods for removing bark and smoothing the edge including using a wire brush abrasive pads and balls and the good old disk sander.