u/Jundope

There were some rusted areas in some of my pins I did not notice till they were black. I tried using two very recommended methods:

-scrubbing with a toothbrush and toothpaste

-leaving the pins in a 1:1 mix of vinegar and water

Sadly, while they're clean, a good few of them have these weird blotches. Is there any way of fixing these stains? What are they?

I can't find anything on google and I even found out that where some of the pins had rust the coating(?) fell off. Nothing is ruined, but I miss the shine they used to have and how clean they were. I'd appreciate any advice because I don't wanna mess them up further, and I thought I'd done enough research. My camera's very bad, I hope this is somewhat clear :(