Hi! This is my first time trying to do this at a comic con so bear with me as I ask newbie questions. I got the Jim Lee CGC fan experience package for the Emerald City Comic Con in March of 2020. It included 3 CGC witnessed signatures on items. So my thought was to buy a CGC 9.9 or 9.8 Jim Lee book, and see if CGC would open it it. Get the signature, then have them CGC it again with the signature. Is that a thing or is that just nonsense and I have no idea what I'm doing. If I can't it's no big deal, I'll get other books to get signed, just curious if that was a thing or not.
Thanks in advance!
-Blake