Sweep or vacuum the concrete surface to remove loose dirt and debris
Wet the stained area with clean water
Apply a rust remover made for concrete or a paste of lemon juice and baking soda
Let the treatment sit for the recommended time
Scrub the stain with a stiff nylon brush
Rinse thoroughly with clean water
Repeat the process if the stain remains
For stubborn stains, use oxalic acid or a commercial rust stain remover labeled safe for concrete
Follow all product safety instructions and wear protective gloves and eyewear
Avoid using metal brushes or harsh acids that can damage the concrete
Pressure wash the area after treatment if needed
Seal the concrete after cleaning to help prevent future staining