With time and use even the best of ceramic lined pots are subject to
micro fractures in the glaze. Using the pickles that we do, this also
works against you. The pot is still perfectly useable. You just have
to think outside of the pot sort of speak. Try using a plasctic
container to put you piece in, then submerge it in the post. This
protects your piece from the contaminates that develop from the micro
fractures. I use old cottage cheese plastic containers in my pots
(large ones), and small yogurt containers for the small pots.
Take the plastic containers, and slit small holes in the sides near
the bottoms. This allows the liquid to drain out easier than trying
to dump it if you have smaller pieces. I use my larger pots for my
copper work. To those containers I add a copper wire handle. With
time the pickle dissolves the copper wire, so I just make a new one.