WD40 came out with a new rust release penetrating oil that works very well. I have not had to use it on guns but it has done wonders on some steel bolts and gears. It is different than the regular WD40 and in a different colored can. Lowes carries it. CLP also works.
Patron Member NRA
"I would not be an old man if I had not been an armed young man." JTJ
I was taught to respect my elders but they are getting harder to find.