trueg50,
I have to give you credit for that one. Looking at your pic I realized that polishing the hammer that way makes good engineering sense when you think about how the parts operate together.
In any mechanism where two surfaces are supposed to slide across each other, a poor or rough finish on either or both, is going to have detrimental effects on how they function.
I seriously doubt that polishing it even better than you did would hurt anything.
If you take it a step farther and polish both the hammer and the mating surface of the bolt it should improve things even more.

My only concern would be if the hammer face is case hardened, in that case you would have to tread carefully or risk polishing the hardened face off and exposing the softer material under it.
It would not present a problem today, but after 10 or 15 thousand rounds you could see some galling of the hammer face from the bolt.

But considering the benefits it would be a small price to pay for a better working gun.