To remove the yellow tint caused by age from a white cultured marble countertop, follow these steps:
Clean the surface: Start by cleaning the countertop with a mild dish soap and warm water. Use a soft cloth or sponge to gently wipe away any dirt, stains, or debris from the surface.
Make a baking soda paste: Baking soda is a gentle abrasive that can help lift stains and discolorations. Mix a small amount of baking soda with water to create a thick paste. The consistency should be similar to that of toothpaste.
Apply the baking soda paste: Spread the baking soda paste evenly over the yellowed areas of the cultured marble countertop. Use a soft cloth or a non-abrasive sponge to avoid scratching the surface.
Let it sit: Allow the baking soda paste to sit on the yellowed areas for at least 15-30 minutes. This will give it time to work on the stains.
Gently scrub: Using a circular motion and light pressure, gently scrub the yellowed areas with the baking soda paste. Be cautious not to apply too much pressure, as excessive scrubbing could scratch the surface.
Rinse thoroughly: Once you've finished scrubbing, use clean water to rinse away the baking soda residue completely. Make sure there is no residue left on the surface.
Dry and assess: Dry the countertop with a soft towel. Check to see if the yellow tint has been removed or improved. If the yellowing is still present, you can repeat the process as needed, but avoid aggressive scrubbing.
Use a marble cleaner (optional): If the yellow tint persists or the surface seems dull, consider using a specialized marble cleaner. Follow the manufacturer's instructions for best results.
Prevent future discoloration: To keep your cultured marble countertop looking its best, avoid placing hot items directly on the surface and use coasters or trivets under beverages or kitchenware. Also, be mindful of using harsh chemicals or abrasive cleaners on the countertop, as they can damage the surface.
If the yellow tint persists despite your efforts, or if you are uncertain about using these methods, it might be best to consult a professional marble restorer or refinishing expert. They can assess the countertop's condition and provide appropriate solutions to restore its appearance.