I sell a lot of items on Ebay. I use white toothpaste (not gel) and a damp toothbrush. For large items I use a damp cloth. Also works on copper, silver, gold, porcelain, ceramics, sneakers, plastics, etc. For my sales I needed one product for cleaning everything.
Brasso cleaner, or vinegar and salt.
Here is a natural method you can try.
https://www.mnn.com/your-home/at-home/stories/how-to-clean-brass-naturally
Any metal polish. Just read the back to verify. I have a few tubes myself. I got mine at a hardware store.
Almost forgot, be sure to wear gloves, the process can get pretty dirty. Good luck!
I sell a lot of items on Ebay. I use white toothpaste (not gel) and a damp toothbrush. For large items I use a damp cloth. Also works on copper, silver, gold, porcelain, ceramics, sneakers, plastics, etc. For my sales I needed one product for cleaning everything.