Brown tarnish on brass plate

Brown tarnish on brass plate

This topic has 2 replies, 2 voices, and was last updated 15 June 2019 at 08:34 by roy entwistle.

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14 June 2019 at 21:37 #414298
David K
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@davidk77137
Hi , I made a Congreve clock about 4 years ago , the brass has a bright polish and coated with Renaissance wax. Its kept in a glass case.

On the brass plates I keep getting a brown mark , almost like a light rust, just in a couple of small areas. I can polish it out but it always seems to come back .

Is this caused by a bit of contamination in the brass plate itself?
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14 June 2019 at 21:37 #3841
David K
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@davidk77137
15 June 2019 at 08:34 #414333
roy entwistle
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@royentwistle24699
Iv'e got similar on a chapter ring but I can see an obvious fingerprint in one of them so suspect all grease from handling was not removed

Roy
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