Coppered

from The Collaborative International Dictionary of English v.0.48

Copper \Cop"per\, v. t. [imp. & p. p. {Coppered}; p. pr. & vb.
   n. {Coppering}.]
   To cover or coat with copper; to sheathe with sheets of
   copper; as, to copper a ship.
   [1913 Webster]