Re: ATM Brasswork

[The Silent Observer <silent1@ix.netcom.com>]

Derek Maskell wrote:
> 
> The new telescope that I am working on just now has quite a bit
> of brasswork on it.  Can anyone on the list advise me as to how
> the brass can be treated to resist tarnishing.
> 
> I have tried cellulose based clear lacquer in a spray can from the local
> motor store but don't find this to be very satisfactory as it is difficult
> to get an even coat and it does'nt seem to last.  Perhaps the technique is
> wrong. Any ideas appreciated.

I'd suggest you try to get brass instrument lacquer from a shop that
repairs or makes musical instruments such as trumpets, trombones, etc. 
This lacquer is used to keep the brass bright, and will both maintain a
brilliant gloss and prevent tarnish for (in my experience) decades.  It
will wear at the points where handling occurs (such as the inside of the
bell of a French horn, where the player puts her hand), but can be
stripped and recoated pretty readily -- more so on a telescope than on
an instrument, as the telescope is easier to disassemble.

I understood this to be a cellulose lacquer, however; I also understand
it to be applied by dipping the instrument parts and letting the excess
lacquer run off.  I could be wrong; I've never applied the stuff, just
read about the process.

-- 
It is well to approach all wonders and miracles by gradual stages or
degrees . . .
                                                           Fritz Leiber

Donald Qualls, aka The Silent Observer           NAR # 70141-SR Insured
Rocket Pages                http://silent1.home.netcom.com/launches.htm
Telescope Pages            http://silent1.home.netcom.com/astronomy.htm

Opinions expressed are my own -- take them for what they're worth
and don't expect them to be perfect.