The Collaborative International Dictionary of English v.0.48:

Crust \Crust\, v. t. [imp. & p. p. Crusted; p. pr. & vb. n.
   Crusting.] [Cf. OF. crouster, L. crustare. See Crust, n.
   ]
   To cover with a crust; to cover or line with an incrustation;
   to incrust.
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         The whole body is crusted over with ice. --Boyle.
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         And now their legs, and breast, and bodies stood
         Crusted with bark.                       --Addison.
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         Very foul and crusted bottles.           --Swift.
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         Their minds are crusted over, like diamonds in the
         rock.                                    --Felton.
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