I used to use that method and turned them on a lathe after glue up. Never tried just sanding. They look better than great.
How long does it take to sand one bowl?
Did you make your own special sanding jigs?
This is fantastic, especially the square ones.
I found the easiest way to sand the inside of the bowl is with a spindle sander and took less than ten minutes work over a couple hours. The reason it took a couple hours for ten minutes of sanding because of the need to change grits on the spindle sander. Ever try doing that? They can be hard to change so I take a passive approach and put the spindle in the freezer for about 30 minutes. The spindle shrinks down and the paper sleeve just slides off.
The outside I do on a 6x48 belt sander. It will probably take about 30 minutes to finish the outside.
When I started making bowls I didnít have a spindle sander and it took a long time sanding the insides, especially the irregularly shaped bowls, like the scalloped ones.