Hi Gary and Welcome Karla!

What a great article you produced, Gary! Even white cement sounds "limy". I still have doubts about adding it to intonaco, though. I would advise to set the panels into the metal (angle iron) frames for strength and hanging will be easier.

Also this "inferior" panel production for Walmart should be an excellent educational tool, as long as the panels will come with a little booklet on fresco - brief history and technique and to spice it up - www.truefresco.com printed all over (the last one is a joke)

Ilia Anossov