Thanks, Phil. Trouble is, my client won't like the look. I guess I'll use dye and sell it somewhere else.I don't have an answer, I think they look great in there. Adds to the look.
These spots are caused by wood worms
I would suggest testing 2 part bleach before committing. On the bottom footI don't know if oxalic acid would work. It's good for some types of stains. If you used two-part wood bleach it would work, but it also would bleach the entire bowl to a very light color.