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topic 17864

Bright dip liquid required


Hello, I am seeking a source of some kind of bright dip here in Australia, to clean up leaded bronze, brass & gunmetal boiler fittings on a Steam locomotive I am restoring.

I am not expecting miracles- but something that will remove years of verdigris & soot leaving a hopefully bright & clean surface would be ideal, and save me a hell of a lot of time.

f anybody can assist it would be most appreciated.

Ian Larcher
Lachlan Valley Railway Museum - Wallerawang, N.S.W. Australia


Hi Ian Larcher,

Try soaking you parts on 5% sodium cyanide solution for 2 to 5 minutes depending on the intensity. If this doesn't work you can go for the below given bright solution for copper alloys. sulphuric acid-2 gal;nitric acid-1 gal;water-1.5 gal;hydrochloric acid-1.5 fl.oz. Room temperature. You can gradually increase the quantity of HCl for better luster.But excess HCl may lead to spotty surfaces.

Venkat Raja
- Kitchener, Ontario, Canada


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