You can search endlessly in scriptures and you will never find God talking about people being arrayed in robes of "gray" that are not "purified."  This is a modified purgatory and does not align with the Word of God. With God it is black and white - light and darkness - heaven or hell, holy and unholy, righteous and unrighteous  --- there is no GRAY or in-between. Many peoples of the world WISH that God would be more like the modern cultures are - you know - I'm ok, you're ok, we're ALL okay as long as we don't get too emotionally involved with those "one way only Christians." You can read MANY stories of people who are abducted by aliens (which I believe are little more than demons). Do you know what many UFOlogists call them?  The "GRAYS."  Un -huh - they are dressed in GRAY. If the Word of God does not say it - stay away from it and that is how I feel about Choo Thomas and her valley of  "unpurified" people dressed in "GRAY."
 
Rene