Fine surface layer (6)
I believe the answer is:
veneer
(Other definitions for veneer that I've seen before include "Decorative coating" , "Thin superficial layer" , "Face" , "A thin outer layer" , "Thin top layer of decorative wood" .)
I believe the answer is:
veneer
(Other definitions for veneer that I've seen before include "Decorative coating" , "Thin superficial layer" , "Face" , "A thin outer layer" , "Thin top layer of decorative wood" .)