We just recently did a bathroom renovation with black marble subway tiles for the shower.
The work was completed yesterday and now we are trying to remove these stains that are on just about all the tiles and it is driving us nuts.
Tried a few different methods including Marble Gold spray cleaner, dish soap and Bar Keepers Friend. None have worked.
Not really sure what else to try or to look for a marble/stone restoration contractor. Its extremely frustrating and making me regret choosing these tiles.
Hoping to get some ideas and suggestions if anyone has any please.