Mamta asked, “How do I remove acid stains from marble flooring?”
Acid stains, such as by a toilet bowl cleaner or battery acid, cause what is known as etching on marble. These stains can be difficult to remove, but not impossible. If needed, a professional marble restorer can always be called to repair the damage.
Using Commercial Products
Using a commercial product to remove the damage is most likely to give you the best results.
You Will Need:
- A marble restorer OR marble polish
- A cloth
Steps to Remove the Stains:
- Get a marble restoration kit or etch removing product. There are a variety available at home improvement stores. Look for products that specifically say they will remove acid stains or etching, such as Fila Marble Restore Kit.
- Follow the instructions on the label of your selected product.
- Another option is to use a marble polish. If using a powder, wipe some water over the marble, then sprinkle the powder over it. Moisten a cloth with water and use it to rub the powder over the stone until it shines. An alternative to polishing the stone by hand with a cloth is to use a buffing on a drill with a low speed setting.
Using Home Remedies
You Will Need:
- Baking soda
Steps to Remove the Stain:
- For fresh stains, sprinkle a generous amount of baking soda onto the stain.¹ The baking soda will neutralize the acid. Don’t be alarmed if the area starts to bubble or foam; that is the effect of the acid and base mixing together and neutralizing.
- If the stain is old, make a thick paste of baking soda with water and spread the paste onto the stain.² Allow the baking soda to sit for several minutes, then wipe away the paste and repeat if needed.
- If the stain remains, moisten the area with diluted (10%) ammonia.³ Ammonia is also a basic solution, which can neutralize the acid.
- Rinse the area well with water to remove any remaining residue from the ammonia.
Additional Tips and Advice
- Do not moisten the area with water before applying a basic (baking soda or ammonia) solution, as the water will reactivate the acid.²
- Borax can be used instead of baking soda if desired.⁴
- Scrubbing vigorously with baking soda could damage the finish of glossy surfaces.⁵
- Wear gloves and ventilate the area well when using ammonia. For more ammonia safety information, see Wikipedia.
- Home Comforts; The Art & Science of Keeping House by Cheryl Mendelson
- Stain Removal by Stephanie Zia
- Baking Soda Bonanza by Peter Ciullo
- Removing Spots and Stains by Ilbert & Elanor Mellan
- Natural Stain Removal Secrets by Deborah L. Martin
- Don Aslett’s Stainbuster’s Bible