Metal finishing Q&As since 1989

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Rust treatment for historic cast iron on stained glass window

I am currently invovled in the restoration of a historic stained class window. All of the cross members are decoratively painted cast iron. I am looking for a method that will remove/neutralize the rust in place. I do not think blasting is an option. I would appreciate any help anyone can give. I have researched products like Loctite's rust converter [on eBay or Amazon] but I am looking for something that can complete neutralize the rust and then be painted over.

Thanks,

David Greene

2006

Remove rust with citric acid [on eBay or Amazon] 5%(or with 5% ammonium citrate solution,pH 3,5),then you can treat it with 20 gm tannic acid [on eBay or Amazon]/15 gm phosphoric acid/1 lit water solution.That is simple and cheap do it yourself rust converter [on eBay or Amazon] .You can try Conservation on Line website too(http://palimpsest.staford.edu),they have very good specialized discussion list.Good luck and hope it helps!

Goran Budija

2006

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our company has an organic/plant-based rust converter [on eBay or Amazon] which safely and quickly neutralizes rust and renders the treated surface self-primed for paint. Please call Barry. good luck

Barry Feinman
BarrysRestoreItAll

Carlsbad, California

2006