A treatment of marble flooring include 4 steps:

Cleaning: Wet the surface thoroughly, then scrub with a mild, nonabrasive detergent using a clean fiber brush. Rinse by flooding with plenty of clean, hot water, then repeat washing if necessary. The final rinse should remove all traces of detergent. To prevent streaking, wipe dry with a clean, lint free cloth.

Remove stains: Stains that do not come out with simple washing should be treated according to the type of stain: organic stains, rust stains, or oil stains. Consult your local flooring professional for the type of cleaner and stain removal procedure for your particular floor and stain situation.

Polish rough spots: If an area feels rough because of small scratches or other imperfections, it should be sanded smooth with extra-fine #400A wet-or-dry sandpaper. After the surface feels smooth, wipe clean then apply water and tin oxide powder by rubbing briskly over the spot until it shines. Wipe off immediately afterwards with a clean damp cloth. Repeat if necessary.

Wax: Apply a top quality paste wax. Buff to a high shine using a lamb's wool applicator or soft cloth.