Welcome to the 27 club, I myself have a 5" nickel 27-2. If you are indeed getting a dash 2, it's likely prior to the 80's. First of all give the gun a gentle but thorough cleaning with a good gun oil. Nickel can be a beautiful finish but you need to be careful to keep it that way. When handling, I recommend keeping a very soft cotton cloth handy to keep it clean. Stay away from anything coarse so you keep that mirror finish. Some people will use a polish or wax to clean stubborn stains in the finish. Search the archives for more information on that.
Congrats on a wonderful revolver,
Jeff