As a side note. I have found over the years two great products for helping with rusty fasteners. Aerokroil by Kano labs (www.kanolabs.com) is by far the best penetrating oil I have ever used. Gibbs oil (www.gibbsbrand.com) is a great product to coat any unpainted metal with or to use as a penatrating oil. I oil all my guns with this and they do not rust.

Both these products have saved my bacon on several occasions.