I don't really know what this is so I'm asking the community.
I have some pistols I stored a year or so ago that I had oiled, then wrapped in VCI paper, then sealed them in aluminum foil sealed storage bags.
Taking them out recently, I notice a white powdery residue on the outside of the VCI paper and also on the pistols themselves.
I see no evidence of corrosion on the pistols anywhere, but I'm wondering what going on that this white powder would form inside a sealed bag.
I "think" it's from the VCI paper, but I just don't know what's going on.
Anyone?