Collocations for coating - noun

thick
fine, light, thin
outer, surface
protective
magnetic, non-stick, reflective
chocolate, metal, plastic

be covered in (esp. BrE), be covered with (esp. AmE), have
The fruit is covered in/with a thick coating of chocolate.

apply
Apply a thin coating of glue to the surface.

form
Frost formed a white coating on the windows.