Rust stains on a concrete patio from old outdoor furniture can be an eyesore, but they are often removable with some effort and the right techniques. The key is to act quickly, as older stains may require more work. Here are proven methods to restore your patio's appearance.
For fresh or light stains, start with a simple scrub using a stiff brush and a mixture of dish soap and warm water. For more stubborn rust, white vinegar is an effective and eco-friendly option. Soak the stain with undiluted white vinegar, let it sit for 30-60 minutes, then scrub vigorously and rinse thoroughly with water.
For severe, set-in rust, you may need a chemical rust remover or a paste made from lemon juice and salt. Apply a commercial rust remover specifically designed for concrete, following the manufacturer's safety instructions precisely—wear gloves and eye protection. Alternatively, make a thick paste from lemon juice and table salt, apply it to the stain, and let it sit for several hours before scrubbing and rinsing.
In all cases, after treating the stain, rinse the area completely with a garden hose or pressure washer on a low setting to remove all residue. To prevent future stains, consider applying a concrete sealer and using protective pads under furniture legs. With patience and the correct approach, your concrete patio can look clean and rust-free again.