It did mention iron mould in the original link, but here's another one - these are quite easy to google, btw http://www.ehow.com/h...ron-mould-stains.html
A few years ago I successfully removed ironmould from an antique lace bedspread using 'salts of lemon' - an acid of some variety. Had to get it from a chemist and he questioned me because it's poisonous but it worked (one of those Victorian remedies)
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