http://www.gowlingstairs.com.au/blog/restoring-a-rusty-and-corroded-external-balustrade
Its best to remove it first and the use a wire brush to remove the rust, best of luck!
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Vinegar seems to be the answer to everything. So how do I use it to clean my mirror?
The columns serve as decorative support for ceiling on front porch. Can the rust be removed with the columns in place? Who does this kind of work?
http://www.gowlingstairs.com.au/blog/restoring-a-rusty-and-corroded-external-balustrade
Its best to remove it first and the use a wire brush to remove the rust, best of luck!