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 1. Clean the stone surface and allow to dry. 2. Apply the product evenly on the rust stain to be removed,      using a brush or a cotton wool. 3. Allow the product to work for 5~10 minutes.     Do not allow the product to react for more than 10 minutes.     (Danger of stain forming) 4. It will turn the original light-yellow color into dark violet. 5. If necessary, repeat the process. 6. Rinse thoroughly with water and allow to dry. 7. After the stone has been successfully treated, apply    "ConfiAd® Stone Protec" to prevent watery substances    from penetrating into the stone as an additional measure     against a new rust. 
     ※ Before applying to the entire surface, test on a small area. |