I always thought of patina as the kind of finish that evolves on the stone steps or never-repolished brass doorknob on the front door of a classic old house. The signs of careful repeated use but not damage, abuse, or neglect. Signs of damage, abuse, or neglect are just ... signs of damage, abuse, or neglect.
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My C&V Bikes:
1972 Bottecchia Professional, 1972 Legnano Olympiade Record,
1982 Colnago Super, 1987 Bottecchia Team C-Record,
1988 Pinarello Montello, 1990 Masi Nuova Strada Super Record,
1995 Bianchi Campione d'Italia, 1995 DeBernardi Thron