Table top "ends"

Even if they did, there is still temperature.

dadiOH

Correct .. a finish will only slow down the process, but will NOT prevent the process.

The key factor in a wood reaching and EMC (equilibrium moisture content) is RH (relative humidity) of its environment.

Some things to note:

1. Wood does not shrink or swell in use unless its MC changes. Read this again, as it is so important. Wood's MC changes when the RH around the wood changes. Of course, if the wood is at the wrong MC when first put into use, it will adjust to achieve equilibrium with its environment and therefore may shrink or swell initially quite a bit.
2. Another key point is that the MC of lumber, as well as shop conditions, should be such that the wood, from lumber to finished goods, will change less than 2 percent MC after drying, in storage, in manufacturing and when put into service.

Here's a handy download:

And another treatise on moisture content of wood in use:

That entire Forest Products Laboratory is a gold mine of wood related information for both construction and furniture uses.

Where are you at now?

Still in AR, Hot Springs now ... up to my alligator in another bath remodel ... this one is sweat equity for Blondie.

No rest for the elderly.

The enlarged downstairs bath? That one is looking good as far as the layout is concerned.