I have been using a negative rake scraper with good results with a burr straight off a 180# CBN wheel. Yesterday I was getting some tearout with it on the inside of an ash bowl, although another ash bowl cleaned up nicely. I honed off the burr with a 1200# diamond card and turned a fresh burr with a carbide burnisher- problem solved. I turned the burr down and back up a couple of times before I was done. Many thanks to John K. Jordan and Robo Hipppy for schooling me on this technique.