is there a finish appropriate for bathroom use?

Pourable clear epoxy? It is what they use on some bar tops. It should be extremely durable. I am not sure on the clarity.

-- Depend on the rabbit's foot if you will, but remember it didn't work for the rabbit.

You can apply poly over it. I do not know how much water, but the poly on my coffee table has held up for over two years now and has glasses sitting on it almost all day. The glasses seem to leave a good amount of water and does not affect it at all.

I dunno…I’ve left a couple of “finishers” in there that peeled the paint off the walls. LOL! Sorry…had to do it!

The bartop mix should suit your needs. You can get it at the paint areas of your big box stores. Do a test on an unseen area first though.

-- Bob Vila would be so proud of you!

Behr Super spar is my main-stay for bathroom finishes. I have even done solid wood & plywood countertops for baths with it- no problems.

-- The only easy wood project is a fire