Removing Stains from Marble.
If the stains were made by grease, spread wet whiting or chloride of lime on them and let it remain for several hours; then wash off. Washing soda, dissolved in hot water, mixed with enough whiting to form a thick paste, and kept on the stains for several hours, will remove grease spots.
Sometimes the marble has a discolored appearance from scratches. If it be rubbed hard with wet whiting and then washed and wiped dry, the mark will disappear. Ink and iron rust are usually removed with an acid, but if that be employed on marble, it will dissolve the stone. The remedies given for grease spots can, however, be used. Should an acid be used on marble, pour ammonia water on the spot and it will neutralize the acid, thus saving the marble.