He recommended an epoxy coating, saying it would "dry hard and smooth like marble." I like what I heard and went with it.
He was able to come out within the week (came out a day early, even) and did a wonderful job on this vanity top.
We love it! It's clean; it's smooth -- it looks like a new vanity top!
While he was here, also, he decided to clean the faucet and the drain trap -- we didn't even ask him to that! And he didn't charge any bit extra than what he quoted for that
Very satisfied and recommend!