James,
My wife bought me the steamer from HomeDepot.com I think. It works pretty well at shining up relatively clean surfaces, but it’s not too good at removing heavy deposits on the bottom of the engine.
The sheet metal on the top of the radiator I always thought came with the kit. It may have been fabricated when it was assembled, or my father may have made it when he hung the horn there.
Thanks for the compliments~ I am having lots of fun!