Started with light grit only to get the heavy stuff off cause the metal is cheap grade stainless... I used wool pads(Foam pads tear apart) on a Milwaukee polisher not a orbital one just the old style straight spinning at 2400 rpm...
The paper I have is a wet sanding paper on a 2in roll that I can tear off a 2ft piece and wrap it and pull back and forth to get smooth
started with 400 then to Ford Bright Metal Cleaner with the polisher...
If you step it more with different grits you can get it looking like a mirror.. Rule is the more you buff the shinier it will get...