I had my Gamo CFX's spring replaced just over a week ago. One thing that is worrying me at the moment is that I watched while the gunsmith of Formalito did this, and he never re-applied any grease or anything to the internals of the gun.
Some guys recommend that one uses CV grease for lubrication. Where are you suppose to use grease? I suppose the spring, but what about the piston?
It was also mentioned that some guns use its lubrication. How does this happen? Is it actually "shot" out with the pellets? (Obviously in small amounts)