The Collaborative International Dictionary of English v.0.48:
Platinize \Plat"i*nize\, v. t. [imp. & p. p. Platinized; p. pr. & vb. n. Platinizing.] To cover or combine with platinum. [1913 Webster]WordNet (r) 3.0 (2006):
platinize v 1: coat with metallic platinum