1. cleaner cleaning: use a mild cleaner, dilute it with water, wet it with a clean cloth, and gently wipe the black mark. Avoid using too irritating cleaning agents to avoid damaging the surface of the Feng Shui ball.
2. Cover and repair: If the black print cannot be removed after cleaning, you can try to cover the black print with appropriate pigments. Ensure that the color used is similar to that of the Feng Shui ball, so that the repaired part can be integrated with other parts.
3. Beauty repair: If the Feng Shui Ball is seriously damaged, it is recommended to seek professional Feng Shui Ball maintenance service. Professional restorers can use specific tools and techniques to repair the Feng Shui Ball and restore its original appearance.
No matter which way you choose, before any operation, make sure that the balloon is basically cleaned up and follow the relevant safety operation guidelines. If you still can't remove the black mark on the Feng Shui ball, it is recommended to consult a professional or related maintenance service organization for more accurate advice and help.