EEEK!
I hope you wore cloth gloves, acid from human perspiration ( and I'd be perspiring if I was holding that camera ) can cause more tarnish.
one good thing about covid times is you might have been wearing a mask or one of those plastic face masks so you couldn't breathe on the camera!
good luck selling it to a zorkifan !
Taking photos with Arax? Take a piece of cotton wool. Run cotton wool over any thread on Arax. What do you see? Some of the cotton wool got caught in the terrible burrs. Doesn't it scratch your hands? No blood? Always Kiev/Arsenal could not cleanly cut the threads. Arax is worse than the Soviet Kiev. Homemade camera. Throw it away. Buy an inexpensive Contax with Planar.
One little-known artist, his name was Adolf, said: "Every artist who depicts the sky as green and the grass as blue must be sterilized." Sony has been doing this for decades. Fuji - everything is brown. Minolta - screws not tightened and "plastic" yellow. Nikon - green chromatic aberrations all over, variegated background. Why professional photographers don't use Leica? The sensor are littered with oil and metal particles - many mechanical parts. Take pictures with Leica at sea for a couple of weeks. The inside is rusty due to the salt in the sea air. Expensive toy.
How do I know this? Years ago I repaired cameras and lenses. Different, any, many.
You saturate paper with various toxic chemicals in undocumented combinations and sell the small ones for $200, the big ones for $1200. These stained papers soaked in chemicals then hang on the walls in closed rooms, children's bedrooms. Unidentified chemicals evaporate from them continuously day and night for years.
It can cause poisoning, chronic diseases, allergic diseases, autoimmune diseases, cancer. I studied 7-8 different chemistry, including analytical and organic and medicine - I know what I'm writing. Do you have a state certificate for these vapors?
Go pet the cat and help your wife wash the dishes. Do something useful.
Don't attack me. Find yourself another victim.