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Originally Posted by kronckew
flashing is the thin 'feathers' of metal that ooze from the body of the item into the thin joint where the two mold halves meet, it's usually cut or ground back, either resulting in the distinctive mold lines around the join, or if properly finished, you'll not see it at all... if you've ever done plastic airplane models, you'll remember the thin plastic you trimmed off the parts to get them to fit. flashing. there may be some in the inside of the rings where it hasn't been cleaned out fully.
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Thanks Kronckew
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........so nothing to do with with raincoats then ...
I found this regarding early moulds for bronze .....interestingly it seems that after casting, 'hammer work' can improve the finished article...
http://ads.ahds.ac.uk/catalogue/adsd...32_039_041.pdf
http://www.darwincountry.org/explore/003450.html
Regards David