How to clean and polish old marble?

Start by dusting or vacuuming the marble, then clean it with warm water and a pH-neutral stone cleaner or a few drops of mild dish soap. Use a soft microfiber cloth or mop, rinse with clean water, and dry immediately to prevent streaks and water spots.

If the marble is dull, use a marble polishing powder or a stone-safe polish designed for marble, following the product directions carefully. For etched or scratched areas, use a marble polishing compound or contact a stone restoration professional. Avoid vinegar, lemon, bleach, abrasive pads, and generic bathroom cleaners, since they can damage marble.

For best results, seal the marble after cleaning and polishing to help protect it from stains and make future maintenance easier.