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formula for verdigris finish

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wantitall | 19:01 Tue 03rd Jul 2007 | Science
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does anyone know the formula for making brass turn to a verdigris (greenish/blue) finish?

I think it involves making a paste of vinegar & baking soda but not sure... thanks
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Avatar Image heathfield
That suggested mix is used for cleaning brass to get the shine back.
Remember gents public toilets that had brass and copper fittings? And how quickly those corroded unless polished every day? Soak it in urine! Then, for a really ancient appearance, bury it in the garden for a few weeks!
10:35 Thu 05th Jul 2007
Avatar Image hundreddolla
1. Make a mix of yoghurt and urine.
2. Put mixture on brass.
3. Stand downwind.
17:43 Wed 08th Aug 2007

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