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