Originally Posted by
Ballistics in Scotland
Quite a bit has been said on this on another thread recently. I would only cook with cast iron I was sure had never been used with lead, and that about rules out yard sales.
Muriatic acid is hydrochloric, and it has been said that it leaves residues which will promote rusting later. I would doubt this, at least if I could find something to boil it in clean water. One or two old gun parts I have haven't gone bad that way. But phosphoric acid is just as good, and has some passivating effect.