coating

英['kəʊtɪŋ] 美['kotɪŋ]

2. a decorative texture or appearance of a surface (or the substance that gives it that appearance);: "the boat had a metallic finish"; "he applied a coat of a clear finish"; "when the finish is too thin it is difficult to apply evenly"

4. the work of applying something;: "the doctor prescribed a topical application of iodine"; "a complete bleach requires several applications"; "the surface was ready for a coating of paint";