You could try some stuff called Wenol it comes in a tube you rub it in with a paper towel until the towel turns black then polish the remaining off with a soft cloth. It work well on my Weld Wheels.
Autosol and Wenol are almost twins.
Best is ultra fine wet sanding with a follow up of wool pads black emey followed by white rouge.
If you want to do a,Wenol type product skip it and Autosol and use Speedy All Metal it is superior.
It can also be used to maintain the look.
I use Speedy to keep things up followed by a. Carnuba wax