glass items I've seen, have the silver overlaid directly on the glass during manufacturing. I could be wrong, but the small cell I have is just overlay.


http://www.cambridgeglass.org/articles/0508/07crystalball409a.php

The salt cellar is not overlay. I have a similar one. (footed w/cut out design)

I have given some overlay perfume bottles to my kids over the years and have a few pieces of my own. Lucking the silver was fused enough to the glass so the polish did not get under the silver. The old timer from this estate sale left salt in the unit plus must have allowed the salt to get under the cut out work.

I just can't keep out of trouble. I'm always resurrecting someones neglect. Sometimes it works, sometimes not.

I will try one idea after another, someone suggested liquid wrench. Think I'll try that next. It is a total loss if I can't get the darn liner out.

To ask a jeweler about it. Try to find an older one with an accent. 🤓

Don't know which of the many things I did worked but after the last soaking in oil, I rinsed the cellar off, put in a 2 qt Pyrex measuring cup and nuked it for about 3 minutes (my microwave is only 700 watts). I then let the foolish thing sit for a while in the hot water. I had just about given up but....took it out of the cup, rinsed it again, one more minute dip in the ammonia. Bravo!, the liner popped right out.
Tomorrow will get out the polish. Right now, I'm sick of looking at it!

I guess this is a case of 'never give up'.

I was going to suggest putting ice inside the cobalt glass and running warm water over the outside to expand it.