The Collaborative International Dictionary of English v.0.48:

Plastering \Plas"ter*ing\, n.
   1. Same as Plaster, n., 2.
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   2. The act or process of overlaying with plaster.
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   3. A covering of plaster; plasterwork.
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The Collaborative International Dictionary of English v.0.48:

Plaster \Plas"ter\, v. t. [imp. & p. p. Plastered; p. pr. &
   vb. n. Plastering.] [Cf. OF. plastrer to plaster (in sense
   2), F. pl[^a]trer.]
   1. To cover with a plaster, as a wound or sore.
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   2. To overlay or cover with plaster, as the ceilings and
      walls of a house.
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   3. Fig.: To smooth over; to cover or conceal the defects of;
      to hide, as with a covering of plaster. --Bale.
      [1913 Webster]

WordNet (r) 3.0 (2006):

plastering
    n 1: the application of plaster [syn: plastering, daubing]