Fill a bucket with hot water and add in 2 tbsp. of bleach and 2 tbsp. of grease-removing soap. Scrub the surface of the etched marble using the cleaning solution with a scrub brush to prepare the surface for sealing.
Wipe the marble surface completely dry using a dry towel. Enable the surface to air dry for an additional hour before continuing.
Pour stone sealer into a bowl, then apply the sealer over the surface of the etched marble using a 2-inch flat paintbrush. Allow the sealer to dry for 12 to 18 hours.
Apply a second layer of the sealer over the marble, then allow the sealer to dry for an additional 12 to 18 hours before use.