Surface treatments are processes applied to the outer layer of materials to enhance their properties. These treatments can improve characteristics such as durability, corrosion resistance, and appearance. Common methods include painting, coating, and polishing, which can be used on various materials like metals, plastics, and wood. These treatments are essential in industries like automotive, aerospace, and construction, where performance and aesthetics are crucial. For example, powder coating is a popular surface treatment for metal products, providing a tough finish that resists scratches and fading. Overall, surface treatments play a vital role in extending the lifespan and functionality of products.