coating
ˈkəʊtɪŋ
noun
a thin layer or covering of something.
a coating of paint
layer,covering,overlay,coat,skim,skin,thickness,plating,film,wash,glaze,varnish,veneer,lamination,sheet,finish,dusting,blanket,mantle,daub,smear,topping,crust,patina,lustre,deposit,scale,facing,cladding