wall of architectural metal in entry

Married to a sheet metal crafts-
man...our house (and garage) is filled with archi-
tectural salvage. These are conductor heads (from the top of downspouts on old buildings) that he replaced. He likes to keep the originals, because they were all hand-formed, and have a beautiful patina that can't really be replicated without years of snow and rain (acid I presume). He has lots of different paints and chemicals to age metal and fake a patina, but the new replacements never "really" look old in the same way years of weather and pollution on the originals do.