If I understand your question correctly the answer is all new materials. What is pictured is the restoration of a Disney loco that construction started in 1953. After several owners it sat idle in an unheated storage building for 15 years until I picked it up two years ago. The orginal insulation was some sort of paper based product that crumbled to powder when the jacket was removed. The jacket itself was blued stove pipe that was completley rusted away around the bottom, the rest pitted and perferated. There was no lead used in the original constructed.
Dave