Rusting Cast Iron

What is the best way to rust new cast iron? Thanks,
CP

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Piss on it.
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make it wet and rub on some salt or ammonium nitrate
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On Wednesday, July 20, 2016 at 5:04:24 PM UTC-7, MOP CAP wrote:

I'd rinse it down with some chlorine bleach and keep it damp.
To get it black, heat it and apply vinegar.
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On Wednesday, July 20, 2016 at 5:04:24 PM UTC-7, MOP CAP wrote:

Nobody has asked "what cast iron?"
If it's a frying pan, it's already got a heavily-oxidized surface which is fairly impervious to ordinary stuff unless it's removed abrasively.
Clean cast iron rusts just by thinking about it.
UNIFORM 'rust' is hard to obtain by any means except heat-treating, which usually gives a black oxide layer, not 'rust' colored.
If you only want _a_ color... try a gun blue treatment (on freshly- cleaned and never-touched metal). If you want 'red rust' for some yard ornament or such, you're pretty much on your own.
LLoyd
Lloyd
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