The surfaces which will be coated, should be cleared of oil and dirt particles. Tunnel degreasing is the most successful method to provide a clear surface. During the tunnel degreasing process, aluminum materials are purified and could optionally be abraded up to 1 micron. The amount of detergent usage differs based on machine design and the quality of detergent. Our machines are designed to use less water and detergent, concerning both usage costs and environmental factors.