RE: Rust
I'm very judicious regarding the care of my weaponry.
I detail inspect and lubeallmy firearms(ML and Centerfire)(Otis O-85 Ultra Bore in the bore, Clenzoil everywhere else)twice a year.
Detail cleaning and lube at the end of each shooting session or if the ML was fired. Even only once.
I've got ML's that are that are coming up 40 years old and none have any rust anywhere.
If I had a dollar for every ML or Centerfire that I have worked on because of rust and neglect I could retire. It's a shame to see anything in a state of neglect.
Tahquamenon