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Antique diancui (kingfisher feather) pieces: Toxic glue + fragile? Let a museum-restoration expert handle it.
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Tang dynasty gold filigree? Unless you’re a medieval blacksmith, pay a jeweler to re-weld those paper-thin layers.
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Ripped silk pibo (scarf) with historic patterns: Textile conservators can match dyes + weave. Your Sharpie won’t.
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