If you want to get a Natural Metal/ Chrome finish, try and get hold of some pictures of metal objects (Google for Metal or Silver or something like that) and use them for the actual textures (Photoreal). Once that's done, give the Alpha Channel a dark shade of Grey and merge it with the repainted textures in DXTBmp.
This should give you reflective Natural Metal/ Chrome textures in FS

Regards,
Stratobat