What is it?

[Chris Campbell]

Ed Swynar wrote:

>Hi Joe,
>
>At first blush, itsounds like tobacco residue to me...
>
>
>
>

I vote for oxidation of plating.  Various old radios I've seen have a
yellowish accumulation on some plated steel parts.  I've got a Scott
stereo amp out in the garage and the tube shields have gotten a bit
fuzzy.  Try a little vinegar for cleaning.

Chris Campbell

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