After a thorough cleaning, apply a light film of Rig Universal Grease. Rig Universal is the best there is IMHO and that should work. The key here is to remove ALL of the rust prior to application!

HINT: When using ANY Flux (even for electronics or plumbing solder joints) remove as much Flux as possible as it will cause corrosion down the line.


RIG Universal Grease, 1.5oz. : BIRCHWOOD CASEY RIG(R) UNIVERSAL GUN GREASE | Brownells