I am making a composter, and I have a piece of "steelduct" that would be
perfect, but it will be used outside and I am concerned about rust.
I don't know what steelduct is and a search didn't turn anything up. It
"looks" like galvenized steel conduit; but I am hoping someone actually
knows. If it is galvanized, is it galvanized on the inside also, or just
the outside? Thanks.