Fluid film is a spray on protectant been around since the mid 60's, from their web site,
"FLUID FILMŪ products offer powerful corrosion protection for all metals and superior lubrication for all moving parts. They are long lasting, thixotropic liquids and gels that have been used for over 55 years in the highly corrosive marine environment of ships and offshore drilling rigs.
More recently they have been introduced and successfully utilized in the lawn & garden, aviation and automobile industries, as well as providing a non-hazardous/non-toxic solution for home maintenance. Facilities where they are used include government, commercial fishing, gas companies, farming, salt, power, and industrial plants."
I did an experiment bout 17 years ago, sprayed a combination wrench then hung it on a line under the dock at the inlaws place on the hood canal (salt water) tide rose and fell twice a day leaving the wrench exposed to the water and air, checked it a year later and it looked like the day I hung it!, great protectant, I use it on the inside of my trailer tongues, I will not put this down a barrel , it's like trying to get cosmoline off, there are much better products to use and the stuff isnt cheap!
Fixing wax, have no clue!