That first revolver on the page looks REALLY bad. It would have been a better candidate for ceracote then trying to reblue that pitting.
This is going to be part of the issue on an old parked revolver. Everything has to be stripped, then properly polished, then a good hot blue to get the depth of color you're looking for. Honestly it's going to cost more to do it right then the gun is worth, so you should understand that going into it. But at the end of the day, it's your gun, your money, spend it how ya want .