[TheForge] Pit cast iron (or steel?)

[Peter Fels And Phoebe Palmer]

Electrolysis Bruce?...pf

Bruce Freeman wrote:
> A friend is working on an artistic casting, currently with a ground
> surface.  He wants to "age" it by pitting and rusting.  He's tried
> muriatic acid (at cold, outdoor temperatures) and it's a no-go so far.
> 
> I've advised him  NOT to move muriatic inside.  He's thinking about
> other chemicals and could use some advice. Does anyone have practical
> experience trying to accomplish such pitting, and can tell how?
>