ᐅ Aluminum masonry cap, natural finish, low maintenance

Hello everyone,
On our terrace, we have a masonry cap made of natural unfinished aluminum. The cap is very delicate and has stains (almost like burned in) that are hardly removable.
Do you have any experience or tips on how I might still be able to remove these stains or how to care for and clean the cap?
Thank you

Nevr-Dull polishing wool for aluminum, brass, V2A stainless steel, chrome, etc. We also use it for the bathroom faucet and similar fixtures. Just search the internet for NEVR-DULL 😉

Thanks for your tip, I will try that!