Nate sent in some interesting stuff. You will want to follow these links.
Bob, i found this article fairly interesting. Namely, the picture of the cross-section of paint layers was rather shocking to me… I’ve seen masks before were one could visually count 5-6 layers of paint.. but its all the more rare to see them shown as rings of a tree… really hits home the cultural use of these…
Full article:
http://www.penn.museum/blog/collection/conservation/conservation-of-masks-for-maya-2012-lords-of-time/Layers of paint:
http://www.penn.museum/blog/conservation/conservation-of-masks-for-maya-2012-lords-of-time/attachment/leica-picture/