The Collaborative International Dictionary of English v.0.48:

Aluminize \A*lu"mi*nize\ ([.a]*l[=u]*m[i^]*n[imac]z), v. t.
   To treat or impregnate with alum; to alum.
   [1913 Webster]

WordNet (r) 3.0 (2006):

aluminize
    v 1: cover with aluminum [syn: aluminize, aluminise]