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Subject: Brass coatings

Brass coatings

From: Henry Grunder <hgrunder>
Date: Wednesday, December 28, 1994
Alan Hawk <nmhm [at] email__afip__osd__mil> writes

>I recently got a researcher request from a collector of microscopes in
>New Zealand.  He has been cleaning and restoring his collection of early
>19th century brass microscopes and has had to remove the lacquer.  He
>wants to restore the finish on these brass instruments and is trying to
>recreate the original finish.

I reply only because I have not seen this aspect of the topic addressed,
and not because I have any expertise.  In my dustbin of trivia I recall,
from many years, that a colleague involved in refurbishing some antique
brass scientific instruments was advised of the absolute necessity of
preserving original contours--especially of not rounding off sharp
corners--in polishing.  To that end a variety of "dubs" and "buffs" are
made up.  I recall that for some purposes she found acrylic pieces (one
avoids saying "Plexiglas") to be ideal, adhering to them either rouge
cloth or leather pieces charged with rouge.

                  Conservation DistList Instance 8:50
                 Distributed: Friday, December 30, 1994
                        Message Id: cdl-8-50-002
Received on Wednesday, 28 December, 1994

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