[lugerholsterrepair]

Gary, I use a shaving brush to give a light coat of oil to all parts, inside and out. This keeps moisture in the air from gaining a foothold anywhere. Then I put a little dab on any part that moves.
Underneath on the rails I put a slight smear of white lithium grease if I will be fireing the pistol.
Be sure you lightly oil inside holes and don't forget to oil the toggle pin..inside the bolt and the fireing pin and spring. Inside behind the sideplate. There is a spring and a well behind the trigger..If you have taken the pistol completely apart you will notice all of these.