Answer
Jul 12, 2021 - 12:05 PM
To remove stains from natural stones we recommend SealGreen Singerman Labs Rust Remover. It is environmentally safe and has many positive reviews. Here is a video on application and a link to Rust remover product information.
We also recommend sealing all clay bricks, pavers, natural stones, cinder and split face concrete block with SealGreen Brick and Stone Sealer with Salt Defense Technology.
How to remove rust stains - video
Source: Sealgreen website