I used a plug-cutter bit on my drill, hoping to take a nice clean piece out of a log that would keep the finish layers intact. It didn't work. The first several rotations destroyed the finishes. Nice hole, but not what I was after. Yes, I can and have taken samples with pocket knife. I'm sure a scalpel would work marvelously. But, I was so hoping for something neat, tidy and uniform.
So, is it the wrong tool? Wrong speed? Or lack of skill with the tool?
-jc