Hi guys,
I'm one of the "train guys" from a neighboring Kalmbach Forum group but since this topic is about natural metal finishes, I just want to share info. I've had outstanding results using Alclad2 finishes, particularly in achieving realistic stainless steel finishes on scale model passenger cars. Here's a link to one of my threads in which a finished model is compared go the "Real Thing":
cs.trains.com/.../198137.aspx