Lionel 6-28255 SPSF SD-40T-2 side frames have zinc pest. This probably affects the entire lot, I have seen many examples
6-29115 and 6-25416 Daylight 18” car sets, underbody detail has zinc pest. Hit and miss, of my 7 cars, 2 have crumbling parts
6-21797 Daylight 4-4-2, paint on drivers bubbled. Every example I have ever seen has this flaw
K-line diecast 4 bay hoppers, zinc pest. I had 3 of the Blue Coal hoppers, one of them exploded
The JLC Allegheny in the post above saddens me, I have one of these that hasn’t been out in a few years. Looks like I need to check it. It is one of the nicest locomotives Lionel made.