Here's a different point of view:
I was having some issues using water-based lacquer to seal a stone, so I posed a question to the stone's seller (an acknowledged expert who's dealt with literally hundreds of Jnats, whose privacy I'll respect). He said he never seals his stones, as he prefers them to look natural (duh). In > 25 years in the business, he's never had a stone delaminate. Sounds good to me.
If you'd like a minimally-used can of Minwax water-based polycrilic, let me know.
