Quote:
Originally Posted by Frank Allegra
Reading your post. If you didn't get the barrels to a full boil and hot enough to evaporate the water after you pulled them out, could those be water stains? It seems that oil would stop the blueing and you would see evidence of it in your boiling tank. I'm not an expert but just a guess. Good luck.
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That's oil. It makes a dark streak that you have to take back out. Usually happens on the last bluing, after spending hours and having them ready but you want to do it one last time. Consider oneself lucky when it happens on the first bluing.
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