Apply the grout remover.
Grout haze remover for polished marble.
Low rpm scrub machine 175 350 rpm wet dry vac.
However you can use the hard water and soap film remover which works very well to remove grout haze and is made for use on marble and all stone.
How to take haze off of marble tile 1.
Grout haze removal solutions first if you already have acetone or mineral spririts you can try to remove the haze with these.
I just replaced the kitchen backsplash and used a bottocino marble tile from home depot and a pre mixed grout simple grout.
Most grout haze removers are acidic and will etch the marble dulling the surface and ruining the finish.
However i m unable to remove the haze on this tile i used a grout and tile cleaner from tile lab some of the haze was removed with this but not very much.
After grouting a haze was left on the tile i ve removed haze on other tiling jobs before by using a cheesecloth.
Water and cheesecloth a rubber grout float diluted vinegar on porcelain or ceramic tile only and a nylon scrub pad and a commercial grout haze remover.
Fill a sponge with water wring most of it.
White nylon scrub pad or aquascrub cotton towels squeegee optional.
Because it is a polished marble made of calcium carbonate it makes it acid sensitive.
Note that you should not be using a standard grout haze remover on carrara marble or any marble.
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.
Neither will damage your stone at all and both are very good for cleaning most substances from the surface.
To remove grout haze cement latex modified and epoxy that has dried on polished acid sensitive stone surfaces.
Of course rinse the spot with clean water right away and wipe dry.
Nearly all grout haze removal products are made with acids and will etch burn the marble floor tile ruining the polished finish and leaving it dull.
Dampen the grout haze with pure water first to see if that removes it.