Marble polishing to Nero Marquina vanity unit and floor tiles This Nero Marquina Vanity unit and floor tiles in a hotel required etch stain removal and general polishing and sealing to protect the stone (Aug' 2017). 1 White etching to marble vanity from normal use 2 Close up of the etching stains on the left-hand side of the sink 3 After careful polishing, the stains are gone 4 Wide view of the previously stained vanity top 5 Floor tiles are showing some staining 6 Inside the shower, the tiles need some polishing and sealing 7 After polishing to a satin finish the floors look much better 8 No stains are visible anymore on the floor see more repairs