After more than 7 years I have the answer! My Arhaus Luca table with a bluestone top etched, stained and scratched from day 1. We just learned to live with it although it looked bad and it never looked clean. Whatever coating was on the stone is what was etching, not the stone itself. I sprayed on a 50/50 mix of Dawn and white vinegar, let it sit a bit then rubbed the table in circular motions with ultra fine steel wool then wiped clean. I did this several times over gone course if a few days. It looked worse (white-ish) before it got better. It’s now clear of all the marks. I am thinking of getting it professionally coated with a product like Hydro seal but I kind of like the un-coated, matte look it has now.
Q