I used to work with a custom rifle maker making bottom metal. I was running the CnC one day and he was on the bench assembling a rifle. He said, “hey, come here for a second and smell this,” whereby he held out a q-tip. I smelled it and it smelled like nothing else I had ever smelled before. He looked at me and said, “sperm oil.” And went back to his work. Turns out Brownells used to sell the stuff and he used it on all his trigger assemblies. Interesting stuff.
