Holy Cow JINI5 that’s horrible! I hope you eventually get a new shell.
I thought I had dodged the zinc pest bullet but when I recently looked at my Weaver troop car it appears to be trying to explode while it’s in the package. Most of my Atlas cars are packed away but I have 6 of the same hoppers (different road name) that Ben has. I fully expect them to fall apart when I take them out of the box. This way if they don’t I will be pleasantly surprised!