yes they do
Yes they do work. I live in Corpus Christi Texas with the sea breeze everything rusts here. I have seen auto parts packed in vci that someone had opened and put back up only part way in the bag and the exposed portion would be covered in rust while the area still in the bag is clean and rust free. I use vci bags for all my guns and it frees me from having to cover all the surfaces with oil I only have to oil for lubrication.