I said 'not silver' in #3293 (after 'Silverlode' came up).
Metals which have been mentioned and which I have not specifically rejected:
-Fe (iron, steel - I didn't quite reject it).
-Au (gold - I mentioned it, so this could be me being sneaky).
-Ti (titanium)
-Cr (chromium)
-Hs (hassium - what, that's not what you meant?
)
-Al (aluminium)
hS (but not Hs, which is radioactive and has a half-life of ten seconds; do not try and make armour out of this)