Here's an article that you might find helpful. I've used the ketchup on touch jobs or Brasso.
I use Brasso. It is stinky, but what we used in the Army and it works great.
I use Brass-O
Just slather it in ketchup, it's amazing how well it works. Put it on, let it sit for at least an hour, wash it off. May. Have to repeat on some areas. Very easy
I use this product and it's simply amazing... here is the link for you, works like a a magic https://amzn.to/2lNSih8
I hope it helps! Bushra
Thank you so much I’ll check it out!