I am a really big fan of cotton insulatiohn and can easily hear the difference between two identical interconnects -- one with (pick your plastic) insulation, and unbleached cotton.
I'm going to be rewiring my Nagas and subs -- both captively on the speaker side, with the same 10 gauge stranded belden wire that Clark uses, but I will strip allthe plastic off the conductors and re-sleeve them with cotton tube, then retwist thepair and put a larger diameter cotton jacket over them, and may even "worm" them some cotton twine before the jacket.
I've also been slowly collecting NOS western electric vintage cloth covered wire and just yesterday got a brand new roll of what appears to be 30 or maybe even 33 gauge -- superb in bundles for interconnects, and I may even rewire my tonearm with this stuff.
As to the corrosion problem -- I have some cloth insulated wire from the 1930s (old telegraph wire, 15 gauge, solid core) and when you slide the the insulation back, it's clean, bright copper -- no green anywhere (and these are unwaxed cotton), same with this fine gauge stuff I just got, and hundreds of feet of 22 gauge and 17 gauge are all the same.
If I have to use teflon, I also prefer the vh audio foam/fep stuff as it is mostly air.
Jupiter makes some nice cotton insulated copper wire and vh audio has some super nice cotton/silver (hold onto your checkbooks), but I've never found the stuff from HGA to be very good -- not sure why -- the cotton is ok, but the silver is probably the most etched and edgy sounding silver I've tried.
Anyway, just my opinion and worth every penny you paid for it
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-- Jim
Jim Rebman -- recovering audiophile
Equitech balanced power; uRendu, USB processor -> Musette DAC -> 5670 tube buffer -> Finale Audio F138 FFX -> Cain and Cain Abbys near-field).
s.e.x. 2.1 under construction. Want list: Stereomour II
All ICs homemade (speaker and power next)