Let it soak for several minutes as directed by the manufacturer instructions.
Remove and replace grout with white marble tile.
Apply the grout remover to the grout haze on your marble tile.
Diy ers if you ve been thinking about replacing grout or grouting marble tile then this is the video for you.
If it is actually a cement haze then if you take some diluted vinegar in a out of the way spot and apply it to the haze it should remove it.
He told me to wash the walls down with 1 part white vinegar and 5 parts warm water before he comes by to remove all the residue of the grout.
Etching is corrosion that eats at the marble destroying the shiny polished layer and exposing the more dull marble underneath so you get dull and light discolored spots.
If you attempt to remove a tile while the grout is in place the grout joints will put pressure on the surrounding tiles which may weaken or crack them.
Scrub it lightly with the sponge to remove the haze.
As you work be very careful to avoid the edges of the tiles themselves as you do not want to chip or scratch them.
In concert with the grout float a large damp sponge can be handy for wiping off any lingering grout haze.
Rinse the sponge often and change the rinse water as it becomes cloudy finally allow.
Remove all the grout between the tiles.
Because it is a polished marble made of calcium carbonate it makes it acid sensitive.
It is not that hard to repair grout once you un.