Interesting work as usual SPQR.

What are your thoughts on the recent work on the supposedly ancient Greek 'white marble' statues with, "...the right mix of inspection with ultraviolet light and infrared and x‑ray spectroscopy has made it possible to figure out the very colors with which these apparently colorless statues once called out to the eye. "

https://www.openculture.com/2016/09/how-ancient-greek-statues-really-looked.html

Really appreciate your thought-provoking work.