I have already removed it from the plastic bag. Just did it to give a visual aid when I raised the question of whether it is a good idea or not.So now the myriad chemicals in the plastic are reacting with the oil or whatever in direct contact with your gun. I'd cut it out right now. However it's a great idea for ammo like my 50rnd pocket packs.
Seems to me there would still be a benefit of less chance of corrosion in a vacuum sealed package - especially down here in Florida.
Perhaps Ren Wax (in leiu of Rem Oil) and then wrapping the gun in wax paper before vacuum sealing. - ?????