metal plating vs coating

metal plating and coating both are nouns.

Word	Noun	Adjective	Verb	Adverb
metal plating	Yes	No	No	No
coating	Yes	No	No	No

As nouns, coating is a hypernym of metal plating; that is, coating is a word with a broader meaning than metal plating:

Other hypernyms of metal plating include coat.

metal plating (noun)	coating (noun)
a thin coating of metal deposited on a surface	the work of applying something
	a thin layer covering something
	a heavy fabric suitable for coats
	a decorative texture or appearance of a surface (or the substance that gives it that appearance)