Originally posted by Ninuxx:


https://en.wikipedia.org/wiki/Zinc_pest

Siku had some issues in the 1990s, some cars were already broken in the blister after hanging a year or two on the pegs.
Majorette did have some issues, but only very few models were affected in the early 1970s.
Matchbox had issues with some collectable lines in the 1990s-2000s (the trucks in 1/64).

As it is a matter of impure materials (or not the correct composition) those things appear more and more when operating manufacturing sites in far away Asia - maybe where probably a CEO of a company has never been. They mix something, sell it ..and that's it! Maybe they chose the cheapest raw materials or whatever.

Pls. do not mix it up with those white surface oxidation ...that can be removed ..and after applying some oil or WD40 it stays without further oxidation.
Zinc pest is irreversible and nothing can stop it.