How to remove grout stain from marble tile
I just had a tile shower installed. The border is made of small glass and Emperador Dark honed Marble tiles. The installer used unsanded grout (coffee color) to prevent the glass tiles from being scratched. The problem is that the grout is so dark it stained the marble stone tiles in the border. The installer found out that he should have used a sealant before grouting. Too late! Is there anything we can use on the marble tiles to take them back to their natural color? Someone please help!