I remove the rind on bamboo with a scraper.For me I use a planer blade, but any good scraper will work fine. Leave the nodes alone ,but scrape upto them.When I scrape I start the stroke lightly and quickly increase the pressure to remove the rind. I start on the belly first, to get my technique down, and then do the back. You really don't want to violate the surface with cuts or divets, as this leads to lifting. I then go over the surface with coarse steel wool and then finer to remove the little bits of rind left, and to polish the surface ready for the finish. This also reveals any spots needing attention, and use your workshop light to examine the surface for scratches.