Explore S&W Forum. There are lots of threads about using scotchbrite pads, Maguires, Mother’s Mag, and other products to produce different results.
Beware that truly polishing something that started out matte may affect future value, or interest from potential purchasers.
I've used Mothers Mag and Alum. polish and a cotton rag with good results. I have a stainless Gold Cup that gets hammered and polished stainless finish is the worst finish out there.