The coating on the surface of the faucet directly affects the beauty of the faucet, and also directly determines whether the faucet has excellent rust and corrosion resistance. When choosing the faucet, the product should be placed in a place with sufficient light to carefully check whether the color of the product surface is uniform, whether there are burrs and sand particles. The surface of high-quality metal faucet is free of oxidation spots, pores, missing plating and blisters, and scorching traces. For example, the surface of Huayi faucet is processed by multi-layer plating process. The surface shows a mirror like luster. The joints of details are tight and the workmanship is fine. After pressing the product surface with fingers, the fingerprint quickly spreads without traces, and it is not easy to attach dirt.