Clean it remove the rust and give it a good coating of Eezox. My Taurus 1911 in blue had rust on the grip safety thumb safety and frame after a sweaty day at my last match and letting the gun sit overnight before cleaning. I removed the rust , quick cold blue and then a coating of Eezox. So far so good.
NRA Life Member, NRA Range Safety Officer, NRA Certified Pistol Instructor, IDPA Safety Officer, USPSA NROI Range Officer,
As you are, I once was, As I am, You will be.