I found a way to remove water stains from marble successfully.
Water stains on marble sink.
These stains can be the result of a water glass that was left on a marble countertop for too long or from hard water buildup around sinks and showers.
Unsure which marble polishing powder.
If you use ammonia put on a pair of rubber gloves to protect your hands.
Water stains are yet another common stain that occurs on marble.
Fill the marble sink halfway with warm water and add 1 tablespoon of mild dish detergent or 1 4 cup of ammonia.
Then i took an old toothbrush and scrubbed it on in the affected areas.
Mold can stain marble bathroom countertops floors etc.
Marble countertops and other surfaces are no stranger to ink stains.
Spray the polishing powder 2 to 3 times with the spray bottle to dampen the polishing powder.
Above the etch mark wipe the surface clean of any grit of dirt.
Finally i wiped it off with a damp paper towel.
It could also simply be water absorbing into the marble which will darken the area to a more gray color.
Rub the paste into the stain with a soft cloth.
But pure water does not stain marble sinks or countertops or tile.
Most likely the dark stain you are seeing around the sink drain is either from mold growth or a rust stain developing.
Mold is a common problem in many bathroom settings.
Difficult stains remove more difficult stains and water spots with a thick paste of baking soda and water.
Add enough mb 11 polishing powder to cover the stain.
Dry with a soft cloth.
Buff hard water accumulations using.
I mixed about a tablespoon no i did not measure of the barkeeper s friend with a few drops of water in a small pyrex glass bowl to create a paste.