I'd imagine you will do well with your "experienced" 66. Replacing the bent rear sight blade with a new blade requires a special "pickle fork" tool and a kit containing a new blade of the proper height as well as associated small parts. READ the instructions that come with the kit. DO the work inside a plastic gallon bag. Small parts will go flying during the process and be contained inside the bag. You can even choose if you want a black or white outline blade.

If the current finish bugs you, I think I do the grey auto repair pad thing to it. A careful touch will get it looking much like what I did leaving the factory. Helpful if you have a factory newer S&W SS revolver to look at to determine direction to work pad.