You will be patting yourself on the back when you pull out that stave to make a bow out of it, no sapwood to remove.
Don't know if you have a band saw but you can take short slices on the sapwood with a band saw and get most of it off, much less work.
I removed the sapwood from a nice stave yesterday and shellacked it. I never put less than three coats on the back of a stave. Shellac is cheap and much easier to come by than a fine stave, take no chances, add a few more coats.