I got a lot of really old but almost entirely unused Airco torch tips today.
Many are of a kind I've never seen before. They are *old* new old stock, maybe
WWII vintage judging by other items in the same lot. They came in original
cardboard tubes which weren't airtight, and they have almost all tarnished. I
don't care if a torch tip is shiny or not, but I'm trying to read the number off
the things, and polishing 49 tips with Brasso would be tedious. I'm wondering if
there isn't some passive method like an overnight soak in citric acid or maybe
vinegar and salt that would clean off the tarnish safely.

Anyone?

Grant Erwin
Kirkland, Washington