I have had my share of issues. However do not misinterpret the zinc pest for paint issues. I have had bubbles and warping from a couple of different manufacturers. I have also seen misapplied paint that looks similar however the issue doesn't go down to the locomotive skin. I know my plastic shells aren't suffering from Zinc Rot and some of your die cast locomotives aren't either. If the surface is smooth and not warped below the paint; you have a paint issue not zinc rot.