There isn't a whole lot that can be done on blued revolver's, that's why I won't buy one I can not live with as-is. IMHO, cold bluing doesn't make it look better and can sometimes make it look worse. My suggestion is to just live with it the way it is. These days it is so expensive to bring them back by refinishing them and the cost and hassle of shipping has gotten out of control.
My mind set & practice has always been buy less of a quantity of guns, but buy them in pristine condition. Buy once - cry once. The very few guns I own in less than pristine condition are a few of the ones I inherited. If they were not heirlooms and sentimental to me I would not keep them. Well, they are - and so I do.
Whenever I have been told I overpaid for a gun, I laugh 5 years down the road when what I paid originally becomes a bargain! I will not grossly over pay but to get what I like, they ain't cheap! I have caught some asleep at the switch once in a long while, but those were the exceptions.