To care for a powder-coated steel furniture, clean it regularly with a soft cloth to remove dust and dirt. For tougher stains, use a mild soap solution and a non-abrasive sponge. Avoid harsh chemicals or abrasive cleaners, as they can damage the coating. If the furniture is exposed to moisture, dry it promptly to prevent rust. For best results, keep the furniture in a dry environment and touch up any scratches with a matching touch-up paint to maintain the finish.