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>HCl is naturally occuring in the 'body'.
>
> The HCl solution I used is only 3% and the fumes were not too bad. I do not
> want things in the basement to rust or get that "brown" film from the fumes.
> Just as important is the effect it can have on the human body.
> I might end up using ferric chloride in the colder months and cupric chloride
> again when it gets warmer when I can do that outside.