A: First, never use just water to clean your stone floor. Plain water will only distribute the dirt around. You want to remove the dirt and soiling with a good neutral stone cleaner. Visit www.stonecarecentral.com for stone safe, quality marble floor cleaners. The floor should not need to be polished if it is new unless it is scratched or damaged. I would recommend having it sealed with a good stone impregnator sealer. You can do it yourself if your handy or call in a stone care professional which can be found here in our "Find-a-Pro" section .