lustering
Webster's Dictionary (GCIDE)
Luster \Lus"ter\, Lustre \Lus"tre\, v. t. [imp. & p. p. Lustred; p. pr. & vb. n. Lustering, or Lustring.] To make lustrous. [R. & Poetic] [1913 Webster]
Flooded and lustered with her loosened gold. --Lowell. [1913 Webster]
Lustering \Lus"ter*ing\, n.
1.The act or process of imparting a luster, as to pottery. [1913 Webster]
2.The brightening of a metal in the crucible when it becomes pure, as in certain refining processes. [1913 Webster] Lusterless