We initially called to get an idea for pricing on restoring/maintaining our black marble shower walls (only recently installed Feb 2020, and polished in April 2020), but were given a wealth of professional advice on cleaning/maintaining and perhaps down the road, honing & polishing the marble. For the advice alone, we couldn't be more thankful, and more than likely when the time comes, we will go with All Stone Tile & Wood Restoration for a heavy duty restoration. We have our work cut out for us to try and keep our shower as brilliant-looking as day one, but with the added knowledge gained, we can be better at maintaining our shower walls and making them last!