To echo the above - please let us see the extent of the damage; people's idea of patina varies.

I think part of this answer is going to depend on what you want the bike for and why you're asking the question. Are you looking to sell and maximize value? In that case the answer is almost sure to be leave it alone - you very rarely get money back from a restoration. Are you trying to save it from rust? We need photos. Are you using it as a frequent rider? Is it meant to win shows? What you're going to do with it will really determine the answer and it really could go either way.