The Collaborative International Dictionary of English v.0.48:

Finishing \Fin"ish*ing\, a.
   Tending to complete or to render fit for the market or for
   use.
   [1913 Webster]

   Finishing coat.
   (a) (Plastering) the final coat of plastering applied to
       walls and ceilings, usually white and rubbed smooth.
   (b) (Painting) The final coat of paint, usually differently
       mixed applied from the others.

   Finishing press, a machine for pressing fabrics.

   Finishing rolls (Iron Working), the rolls of a train which
      receive the bar from roughing rolls, and reduce it to its
      finished shape. --Raymond.
      [1913 Webster]

WordNet (r) 3.0 (2006):

finishing coat
    n 1: the final coat of paint [syn: finish coat, finishing
         coat]
    2: the final coating of plaster applied to walls and ceilings;
       "we can't paint until they put on the finishing coat" [syn:
       finish coat, finishing coat]