Creating metal sculptures that endure urban pollution requires careful planning and execution. Start by selecting corrosion-resistant materials like stainless steel, bronze, or corten steel, which naturally develop a protective patina. Apply specialized coatings such as powder coating or clear lacquers to shield surfaces from acidic rain and pollutants. Regular maintenance, including gentle cleaning with pH-neutral solutions, helps preserve the artwork's integrity. Consider the sculpture's placement—elevating it slightly above ground level reduces exposure to road salts and moisture. For intricate designs, use welded seams treated with anti-corrosion primers. By combining durable materials, protective finishes, and smart positioning, artists can ensure their metal sculptures remain visually striking despite harsh urban environments.