I tried with polyethelene gloss finish, but I couldn't get it to lay down right, so I sanded it all down, and went to the tung oil.
It's not as nice as what I've seen Chris and others do, but it's good enough for me. The wood part was easy in comparison. When something went wrong, as it often does on one of my projects, I just saw the wood of the plimth, make new boards from 1 1/2" thick boards of Purpleheart on my tablesaw, shape them, install and sand them, and lastly, put the Tung Oil finish on the table.
It was a very long and engaging process, but I enjoyed it, and I love what I have to show for it.
Thanks for your comments.
Best regards,
Dan