> Hi Scott
> It's a "cool" idea ;-)
> But there are millions of blocks.. And yes only a few dozen
> "critical" blocks.
> I'm not sure if it would work that well . Maybe Phil has some
> ideas on that one.
> Otherwise I cannot think of any good reason to paint a block
> white in the quarry..
> Do they do it today??
Wait, are you addressing the plaster UNDER the glyphs vs. the plaster OVER the glyphs? I very much doubt that heat is a concern with limestone sitting in full sunlight.
The following options come to mind:
1. The glyphs were all done at the same time, and some plaster was applied before the glyphs were painted, and some plaster was applied afterward.
2. The plaster was all applied at the same time, and some glyphs were painted before the plaster was applied while other glyphs were painted afterward.
3. A little of both #1 and #2.
I haven't had a chance to examine the plaster that well so I don't have a strong opinion about those three options (and I'm sorry that I'm not keeping up with the details in all the new comments in this discussion so far today yet).
(Sorry if I'm disjointed here, I'm trying to multiplex way too many things in my day job over here!)