Alloy/Copper streaks on modern gold & PCGS Guarantee

I was looking at my collection and was quite disappointed to find that my 08 W Buffalo $50 pr70 is developing multiple red streaks/spots(at least four on each side of the coin and a whopper on the Indian's temple-pretty unattractive).Is this issue covered by PCGS's guarantee?If the coin is conserved will the streaks/spots recur?....This is the third modern gold PCGS coin I've seen with this issue(07 pr and 08 pr $50 Buffalo and a 07 Jefferson unc $10),I haven't run across this issue with NGC slabbed modern gold,have you?Thanks,Steve
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<< <i>I was looking at my collection and was quite disappointed to find that my 08 W Buffalo $50 pr70 is developing multiple red streaks/spots(at least four on each side of the coin and a whopper on the Indian's temple-pretty unattractive).Is this issue covered by PCGS's guarantee?If the coin is conserved will the streaks/spots recur?....This is the third modern gold PCGS coin I've seen with this issue(07 pr and 08 pr $50 Buffalo and a 07 Jefferson unc $10),I haven't run across this issue with NGC slabbed modern gold,have you?Thanks,Steve >>
Previous thread.
To answer your question, no I have never seen gold tone in an NGC holder. Unfortunately, I have seen lots of PCGS 69s in NGC 70 holders. --Jerry