And there is a good chance it isn't covered anyway. From the PCGS guarantee under things not covered (emphasis mine)
Coins exhibiting environmental deterioration. The PCGS Guarantee does not apply to coins exhibiting environmental deterioration subsequent to PCGS grading and encapsulation. This deterioration may include, but is not limited to, spotting, hazing, PVC contamination, changes in color, and corrosion.
Coins exhibiting environmental deterioration. The PCGS Guarantee does not apply to coins exhibiting environmental deterioration subsequent to PCGS grading and encapsulation. This deterioration may include, but is not limited to, spotting, hazing, PVC contamination, changes in color, and corrosion.



















