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Re: [OM] ...verdigris.....

Subject: Re: [OM] ...verdigris.....
From: Garth Wood <garth@xxxxxxxxxxxxxxx>
Date: Wed, 03 Nov 1999 19:54:05 -0700
At 08:12 AM 11/4/99 +0800, TMLee wrote:
>Dear All,
>How do U clean off verdigris from battery contact coil springs and plates
>and what have U... the very humid conditions here are wreaking havoc on my
>Winder 2 and even my 10 year old Metz 32CT7..... causing them to perform
>erratically...
>
>Does a fresh layer of solder help ?


Try any of the following:

1. Very fine steel wool (grade 0000);
2. Fine or very fine sandpaper (the kind used for polishing, rather than stock 
removal);
3. Methanol (if it's encrusted) or 99 0sopropanol ("rubbing alcohol").  
WARNING:  Do *NOT* use 70 0sopropanol (also sometimes sold as "rubbing 
alcohol") as a substitute -- it's 30% water, and probably not a good thing to 
get in your Winder.

You might want to go at it with methanol or iso first to remove everything 
that's loose, then use very fine steel wool or other fine abrasive.  After 
that, re-tinning the contacts might be just the thing to do.  As an alternative 
abrasive which is very gentle, try using synthetic or rubber erasers (the kind 
that are used to erase pencil marks).  Sometimes these are enough.  Various 
other options exist, but they involve abrasive or polishing pastes, and you 
might be working in cramped conditions and won't want to get the paste 
somewhere you can't easily clean it from.

Good luck.  I know what a pain it can be when your Winder's sick.  :-/

Garth

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