[Boatanchors] Chemicals to remove old stains on switch wafers

[Richard Knoppow]

    Do you mean the contacts or the wafers?  If the contacts I 
would stick to Deoxit D-5. They may be silver plated brass in 
which case you are seeing silver sulfide. A silver cleaner of the 
sort sold for cleaning dinnerware will certainly take off any 
oxidation and leave bright brass but takes off a lot of metal. 
Not something I recommend.
    If you do clean them to where they are bright metal I suggest 
coating them with a very thin layer of Vaseline or silicone grease.
     I would be much more concerned with how they work than how 
they look.

On 7/6/2022 12:23 PM, Yongsurk Lee, HL1FB wrote:
> What would you use to remove old stains and oxidations on vintage selector
> switch brass contacts on wafers? I am restoring old TV-7 tube testers and
> want to make the switch wafers like new, bright and shining.
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL