Metal-inlaid stone sculptures are exquisite artworks, but over time, oxidation can tarnish their beauty. Removing these stains requires careful techniques to avoid damaging the stone or metal. Here are the most effective methods:

1. Gentle Cleaning with Mild Solutions

Mix a solution of warm water and mild dish soap. Use a soft-bristled brush or microfiber cloth to gently scrub the oxidized areas. Rinse with clean water and dry thoroughly to prevent further oxidation.

2. Baking Soda Paste

For stubborn stains, create a paste of baking soda and water. Apply it to the oxidized metal and let it sit for 10-15 minutes. Gently scrub with a soft brush, then rinse and dry.

3. Vinegar and Salt Method

Combine white vinegar and salt to form a paste. Apply it to the oxidation, leave for 5-10 minutes, then scrub lightly. This method works well for copper or bronze inlays.

4. Commercial Metal Cleaners

Use a non-abrasive metal cleaner specifically designed for the type of metal in your sculpture. Always test on a small, hidden area first to ensure compatibility.

5. Preventive Maintenance

Apply a thin layer of wax or specialized metal protectant after cleaning to shield the metal from moisture and air, slowing future oxidation.

Avoid harsh chemicals or abrasive tools, as they can scratch the stone or strip patina from the metal. Regular dusting and keeping the sculpture in a dry environment also help maintain its luster.

For valuable or antique pieces, consult a professional conservator to ensure safe and proper restoration.