How do I clean copper and brass door hinges?

Deborah...Try Brasso polish

Agree. When clean, spray on some clear varnish to prevent corrosion. Mask off surrounding area.

Get a cream cleaner called brasso it works great

If they’re not plated, I’d be surprised on the copper. It’s too soft for hinges.

Yes, Brasso if they’re solid brass. Brasso will wear through brass & copper plating, so use the magnet-Test first.

I would get all the pin grease off first with a rag & some WD40.

Brasso works really well for cleaning up all kinds of metals. I used it on a very tarnished brass platter - https://www.girljustdiy.com/polished-brass-platter/

here are some ideas for cleaning copper from hometalk:

https://www.hometalk.com/search/posts?filter=clean%20copper

Here's a tutorial that might help - https://chascrazycreations.com/copper-cleaning-hacks/