The rough turned birch bowl from April 2012 had reached it’s final weight.
So I turned off the edge to get rid of the pith, shaped it, scooped out the inside, sanded and finished it with Howard’s Feed-n-Wax (beeswax, carnauba wax and orange oil).
Reverse mounted it in the Cole Jaw chuck to turn off the tenon and the shape the bottom.
The black holes and lines are tracks left by small (<1 mm) beetles that evacuated the bowl during one of the early micro-waving drying steps.
Several of the tracks (e.g. the little hole on the left of the bottom rim) go all the way through.
(See also the earlier post for details)