Yes great stuff expensive; discovered it when i was learning to be an aircraft mechanic. protects bare aluminum that loves to corrode. I’ve been using it since the early 80s on anything I wanted to prevent corrosion on. Yes I’ve used it on rifles it’s not as bad as cosmoline when it comes to removal; have Naphtha or other on hand when the time comes to remove it.Anyone ever use a product called LPS3 for protective storage ?