People have parts like this polished not for beauty, but to reduce the chances of stress crack related failures, by polishing out surface imperfections
1957 BSA valve & primary covers
These poor things looked like they were found at the bottom of the "Great Salt Lake" when I got them.
"High-rise" intake for a flat-head Ford
"Eddie Meyer" flat-head intake
1907 American "Underslung" Wheel holder Before....
Misc. parts for 1907 American "Underslung"
1969 Sand-cast Honda CB750
Some very old pots & pans done for display at Paris Gourmet.