Finally PBS made it's way into our site's pages. I guess it is good. I would like to suggest a few other resources to get an idea about the "al fresco" painting process.

Brief and illustrated step-by-step demonstration about painting of the small fresco panel.

http://www.truefresco.com/technique.html

Detailed "slide show" from the creation of the Albuquerque Fresco (over 400 sq. feet). Painted in 15 giornatas.

http://www.truefresco.com/albuquerque_show.html