Rough lumpy metal, bashed and beat on.
Brass. Old. Valuable.
Basic hand tools: small hammer, Marlin spike (12in), deep reach hammer
Good lighting.
Comfortable working position.
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Sometimes you never know what is under the lumps and bashing, nicks and gouges....
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1800's French "bowl mfr" was hammered in "courses" - marked lines circumferential, starting heaviest hammering at outer edge and proceeding lighter towards Center.
Cool stuff to find when carefully planishing.
(Very particular customer and collection.)