Can this be fixed?

[ponyprincess2021]

I noticed lately all my g1 ponies in my collection all have shiny almost glue like spots on them. I don't think it’s plasticizer leakage because they aren’t sticky. They’re mostly just really shiny in some spots. Is this just an aging thing or something else?. Is it something that’s fixable?. Or do those spots remain.

[BlackCurtains]

I've come across this too. A lot of Argies have this problem. I think it's a manufacturing defect, like regrind.

I don't think it's harmful, but I don't think it's fixable either.