How to clean and old Air Variable Cap?

[Naysayer]

Found a V Air cap on eBay and ordered it. It's looks to be in good condition for it's age but oxidation is evident. What can I use to treat the aluminum metal?

 

[loosecannon]

i can't speak from experience but i tend to trust what Nomad Radio says, and i just read a thread where he used Air Conditioning coil cleaner on a variable capacitor.

It would be best to consult him before trying it IMO.
LC

 

[Naysayer]

A few months ago I serviced 2 large window AC units and still have more of the coil cleaner left. It should have occurred to me. Yes, I suspect you're right and it should work well. Thanks

 

[nomadradio]

The air conditioner coil cleaner we've used for decades is mostly phosphoric acid, water and blue dye. Does a number on aluminum, brass and copper. Beware using it on anything silver plated. It will scrub the silver right off the surface. Called Lundmark Coil Cleen. There are others, but that's the one we use.

73