MB-11 Marble Polishing Powder is user friendly, easy to implement, and requires NO power tools. It's designed as a spot polisher to remove light etchings and water rings from your stone and will restore the majority of water stains and acid rings from polished Marble, Travertine, Limestone, Onyx, and any other calcite based stones.
Other Household Uses:
Calcite Based Stones
Kitchen Countertops
Polished Dark Granite (Removes most water spots AND ghost rings.)
Tables
Vanities
To finish with a Professional Touch...
Spray a little bit more water on your "spot" and rub
in the remaining Marble Polishing Powder. Use a very slight pressure and work in a circular motion starting small and widening (blending the edges) until the surface is shiny and dry.