The major name brand canned sealers are all good at delaying staining; few prevent etching.

Congratulations! I applaud the use of a stone that's quarried in the USA, and Danby is an amazing operation. I just wrote a profile of the quarry, if you're interested -

https://usenaturalstone.org/a-mountain-with-a-heart-of-marble-going-underground-with-vermont-danby-marble/

Sorry, this has nothing to do with your actual question. But sometimes it's nice to know the story behind your stone, and in this case it has such a cool story!

Karin:

I loved the article, but I don't know from where you get the " 440 million years ago" business. According to religious broadcaster Bob Dutko, the earth is only about 6,000 years old.

I don't know whom to believe. I love to believe in science, but I don't want to eternally burn in Hell's fire for blasphemy for doing so.

right. and dinosaurs walked the earth w/man 6000 yrs ago too.

I think i'll side w/blasphemy.

I'm full-bore toward blasphemy, along with every other geologist. I'm sure they're all having a terrific party down there!