On Sat, 6 Nov 2004 09:21:38 -0330, "Keith Young"
wrote:

Derek
No not the base that it sits on. That I concave in slightly. The interior
of the bowl i,m refering too. I don,t like all my bowls that concave in (
on the inside ) but some that seem perfectly flat when i,m finished are not
when the finish is applied.maybe a flat edged plastic ruler would give me a
good indication before i decide there finished.

Keith

when I visualize trying to get a bowl (what size are we talking
about?) totally flat inside, I wonder how you are doing the
transition from bottom to side. That is particularly hard to sand. If
a bowl is wide enough, then yes, a small straight edge could help, but
if you look in your cupboard at the various metal, ceramic and pottery
bowls, you won't find many with a 'flat' bottom because even a small
curve makes them easier to work with.

If you are determined to achieve a certain 'look', just make several
wooden blocks of various widths that you can use as small
straightedges,,,