Surface treatments are processes applied to the exterior of materials to enhance their properties. These treatments can improve durability, corrosion resistance, and aesthetic appeal. 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 such as automotive, aerospace, and construction, where performance and appearance 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 materials.