I was reading on AAW the other nite about different ways turners finish off the bottoms of their vessels. There are times when i have problems with my own method and thought I would see how others are doing theirs.
Here is the way I finish the foot on my vessel (Green Wood)
Picture 1-3 showing that I have turned this to final shape and has the tennon still attached. This vessel will dry inside for several weeks or more before being returned to the lathe to be finished sanded and parted off.
Picture 4 - showing one of two ways i finish it and part it off - in the picture im using a mandrel and with a little adjustment and securing im ready to take a couple cuts on the bottom down to the tennon to level is out. Then I take the nub down as far as i can and cut the nub free. Then slice off the nub and take to the drill press sander and finish sand and level the bottom by holding it up to the turning disk. Pictures 5-6
Reason is there is not much room to sand the bottom between the tennon and the bottom of the vessel so alot of times it is marked up and needs additional sanding. Doing it on the Drill press works well but you have to play around alot of times to keep it level by testing on a flat surface and doing more sanding.
Other method after drying is to remount it finish sand and just leave it in the chuck and take the tennon down as far as i can then cut it free. Again, slice off the remaining nub and take to the drill press sander. Pictures 5-6
I like the drill press method for finish sanding on the bottoms of vessels but the draw back can be in the leveling as you finish it that way.