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