TM, once again you accuse NCS of coin doctoring without knowing specifically what methods were used to conserve these coins. You also repeatedly seem to infer that only NGC will grade and holder coins which have been cleaned or conserved. The PCGS article at the following link states in part "No matter how the results are achieved, many coins have been improved by judicious cleaning with commercial dips, solvents, or plain soap and water. PCGS grades many coins that have had their surfaces altered by the removal of "problems," perceived or otherwise."
Detecting Doctored Coins, Part 1- PCGS - April 4, 2000
You have provided nothing whatsoever to show that any grading service would have rejected these coins, or that there is indeed any issue with the current "true condition" that would have prevented their grading. If a coin comes in contact with PVC, and that PVC is removed, is the coin somehow ruined forever and "doctored" from that day forward?
I guess this is just a topic we will never agree on. If this was indeed an attempt to deceive anyone why publish an article telling everyone about it? I haven't seen any coin doctors do that yet.
I wonder how you would feel if that had been your collection that was restored? Personally, I would have been thrilled! Regardless of any TPG involvment, just to have my collection viewable again, is worth any petty comments from the TM peanut gallary.