{TAIL ~ At least a portion} of the first surface or {HEAD ~ second surface} is coated with a first coating material 
{ TAIL ~ At least a portion } of the first surface or { HEAD ~ second surface } is coated with a first coating material
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH