The zinc cladding that is the "finish" layer on the Library can definitely be a substrate for more exotic materials -- including chrome, stainless steel or a number of other potentials including wood forms with Tamarac, Cedar or Teak. I think the form of the Library remake is just fine -- as I have said many times previously (especially considering what the architects had to work with in terms of scalable reno of a square block-like un-inspired build). I doubt the final chapter has been written on this building.