I use a bowl gouge to get nearly the inside shape I want, then use a scraper
to smooth the inside because I always leave a few ridges with the bowl
gouge. The scraper, I think, comes from Sorby (I am upstairs and the
workhop is all the way downstairs). It is round and sharpened on the left
edge as well as the tip and that makes it very easy to use on the side of a
bowl. .Only cost me about 20 bucks.

Bob Moody