But Brass doesn't rust???

[tubeboob]

I picked up a Fisher X202B integrated with what looks like original brass caps on all of the knobs.

Only issue is that some of them seem to have rusted.

I know brass does not rust, so . . . did Fisher use non-brass caps, or are these likely replacements?

They look like the original brass knobs that I found on my 400 (which only needed a cleaning in order to shine).

To be honest, I have not yet tried to clean them, but it certainly looks like rust.

Whaddyathink??:scratch2:

 

[Fisherdude]

Probably corrosion. If so, it will polish off. Yours are almost certainly original.

Afaik, all of the available replacements are solid brass, except for Paul Grzybek's, and his are anodized aluminum so they won't rust either.

 

[Sam Cogley]

It's possible that they were against something rusty, too. I've seen rust transfers that took some scrubbing to remove.

 

[soundmotor]

Magnet test?

 

[gadget73]

Could be brass plated steel? Magnet test will tell you much.

 

[sloober]

Brass will often go dark brown, but the lacquer will also change. I bet with a slight polish with brasso, you will be all set. John

Look here.http://www.audiokarma.org/forums/showthread.php?t=195257&highlight=polishing

 

[Sam Cogley]

Brass will often go dark brown, but the lacquer will also change. I bet with a slight polish with brasso, you will be all set. John

Look here.http://www.audiokarma.org/forums/showthread.php?t=195257&highlight=polishing

Excellent advice there - saved for future reference! :thmbsp: