Surface coating is a process of applying a thin layer of material to the surface of an object. It is used to protect the object from corrosion, wear, and other damage, as well as to improve its appearance. The most common type of surface coating is paint, but other materials such as plastics, metals, and ceramics can also be used. The FINISH of the coating is determined by the type of material used and the method of application. The term 'FINISH' refers to the smoothness and shine of the coating.