PCGS has a good outline about this topic. I saved it for future use and here it is:
https://www.PCGS.com/News/Tips-From...m%20Part%201
This looks like a no brainer based on that PCGS summary.
https://www.PCGS.com/News/Tips-From...m%20Part%201
This looks like a no brainer based on that PCGS summary.






















