Corten steel, also known as weathering steel, is a popular choice for outdoor furniture due to its rustic, durable finish. However, to maintain its appearance and longevity, proper cleaning is essential. Here’s the best way to clean corten steel outdoor furniture:

1. Remove Loose Dirt and Debris: Use a soft brush or cloth to wipe away dust, leaves, and other debris. Avoid abrasive tools that could scratch the surface.

2. Wash with Mild Soap and Water: Mix a mild detergent with warm water and gently scrub the furniture with a soft sponge. Rinse thoroughly with clean water to prevent soap residue.

3. Address Rust Spots: While corten steel naturally develops a rust-like patina, excessive rust can be managed. Use a mixture of white vinegar and water (1:1 ratio) to spot-treat stubborn rust. Apply with a cloth, then rinse and dry.

4. Dry Completely: After cleaning, ensure the furniture is fully dry to prevent water spots or accelerated rusting. A microfiber cloth works well for drying.

5. Apply Protective Wax (Optional): For added protection, consider applying a clear car wax or specialized corten steel sealant to slow down oxidation and enhance the finish.

Regular maintenance will keep your corten steel furniture looking its best while preserving its unique weathered charm. Avoid harsh chemicals or pressure washers, as they can damage the steel’s natural protective layer.