Brasso not working - any ideas how to clean these candlesticks??

[FusionChefGeoff]

They were a charity shop purchase so not sure what they're made of but they look a bit crappy now... any ideas for how I could clean them?

Test it with a magnet to see if it’s brass or not, and what the best way to clean it will be

https://www.bhg.com/homekeeping/house-cleaning/surface/how-to-clean-brass/#:~:text=Brass%20Cleaning%20Tips,-Just%20because%20an&text=Check%20the%20metal%20with%20a,cloth%20is%20the%20safest%20choice.
Just because an item looks like brass doesn't mean it's pure. Check the metal with a magnet; if it sticks, it's not real brass. Many items are brass-plated, and most cleaning methods could damage them. If the item is brass-plated, soap and water on a soft cloth is the safest choice.
Also, check to see if the brass has been lacquered. Most cleaning methods will damage lacquered brass, so your best option is to take the piece to a professional.