Cleaning a Zippo

Earilier today my dad found his old 1989 brass zippo, since he had no use for it he gave it to me, and i already owned a brass zippo, so I wanted to see If I could clean it up.
I started of by cleaning it with some brasso, I took out the insert and scraped off some of the rust , then to stop it from rusting again I sprayed it with some wd40. I re-flinted it and added gas and now its almost identical to my 2011 brass zippo