[78-L] Cleaning bare aluminum discs?

[Mark Bardenwerper]

On 6/25/2012 9:09 PM, Glenn Longwell wrote:
> I recently came across 18 aluminum transcription discs of 1934 Jack Benny shows.  Unfortunately, they all have zinc oxide spots.  I've been wondering what to do with them so this thread is relevant but it would seem these may be a loss.
>
Didn't someone mention using creme of tartar? 2 tbsps per gallon of hot 
water.

-- 
Mark L. Bardenwerper, Sr.

Technology...thoughtfully, responsibly.

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