Alright, it sounds like David knows much more than myself but I do not think TPGs are using the equipment that he is referring to...maybe I'm wrong, but I've never seen anyone use more than a 80x loupe, black light and some computer technology. So in that regard, with those tools, I will stand by my statement that good restorers can make it undetectable to TPGs...maybe not museum folk, but TPGs simply aren't museum folk.
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