Welcome Tac.

That is a nice old M&P you have there. Hard to tell much from the one image , but it looks as though there is a fairly nicely developed patina to the finish.

Your gun , not mine but --- PLEASE do not rush into polishing that revolver! You would quickly eliminate the patina that was many decades in the making , and then you would have exposed steel.
I own a 5" M&P from about 1909 - and I wish the finish looked like yours.

Elsewhere , those target grips look way out of context with the gun , but I bet they shoot function real well for shooting. FITZ , by any chance? If you wish to go more original , period appropriate grip panels can be found , check E-bay. Lots of repros out there too , but the newness would stick out sharply.