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Subject: Metal polishes

Metal polishes

From: James Moss <clkmkr>
Date: Saturday, March 17, 2007
Mary-Margaret Fincher<mary.fincher [at] gmail__com> writes

>In my project, I will also be testing the polishes and recording my
>observations on things like abrasion, residues/streaking, each of
>application, time needed and amount of product used. The polishes I
>will be using on my samples of silver and brass are:
>
>    Hagerty's Preventive Silver Polish
>    Hagerty's Copper and Brass Polish
>    Twinkle Silver Polish
>    Twinkle Brass and Copper Polish
>    Silvo
>    Brasso
>    Precipitated chalk

Brasso contains an ammonia (amine) component and should not be used
to polish brass because it may produce Stress Corrosion Cracking of
hardened brass objects. Regards,

James Moss
Horological Conservator
USA


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                  Conservation DistList Instance 20:46
                  Distributed: Friday, March 23, 2007
                       Message Id: cdl-20-46-007
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Received on Saturday, 17 March, 2007

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