The Collaborative International Dictionary of English v.0.48:

Surface \Sur"face\, v. t. [imp. & p. p. Surfaced; p. pr. & vb.
   n. Surfacing.]
   1. To give a surface to; especially, to cause to have a
      smooth or plain surface; to make smooth or plain.
      [1913 Webster]

   2. To work over the surface or soil of, as ground, in hunting
      for gold.
      [1913 Webster]