Well thanks to everybody on here, (really, thanks, these nicks were very annoying)I have finally got rid of these little nicks pretty much completely! What I was doing was going back and forth with the scrapper, and when I went back I was jamming the bur into the bamboo a bit. After switching to only pulling the scrapper toward me, while gently touching the bur down before pulling as to avoid hitting the bamboo with the bur, I finally have a clean perfect bamboo back after scrapping the rind! Thanks yall. I am all kinds of stoked, you have no idea, haha.