[T.B. Yoits]

Cosmoline is a heavy petroleum product that after exposure to air, forms a waxy like brown substance which protects metal parts.

Would it be feasible to wrap the gun in plastic wrap and then in Cosmoline with the idea being that the Cosmoline will provide an airtight seal but the plastic would keep the Cosmoline from sticking to the metal?

Couldn't the same be done with candle wax? Wrap the gun in plastic, pour candle wax into a long flat box, put the wrapped gun in, and then fill the remainder of the box with wax?

[Tilted Irish Kilt]

T.B. Yoits :" Couldn't the same be done with candle wax? ".

I imagine a box could be filled with wax or paraffin for an airtight seal,
however I believe it to be fairly costly.
It might be cheaper to just purchase a ground vault with moisture and oxygen absorbers.