Dear Ilya,
Here I am a year later, and I still am trying different things for this problem. I now have a series of panels ordered which are all largish( 20x24, 12x18, etc. ) and am trying to work out a method. They want to be framed, but no glass.
I saw this website link from France- http://www.atelier-st-andre.net/en/pages/technique/fresco_technique/portable_fresco.html#Anchor-La-6934
Has anyone tried welding their own frames to plaster into? What does that involve? Is that conceivably a DIY thing, or would I need to call a machine shop?

I like wooden frames, but there needs to be something to attatch it to..

Any other ideas?

Also, they mention a lightened concrete. Has anyone tried this? It also says they don't make it in the US, but when I spoke with a contractor, he said he does use something which sounds like that on floors.
I only use portland cement in the first coat, but what about it???

Thanks so much!!

Hi There,

We use metal frames on panels of about 3ftX4ft
and you can weld mash to it.

However for small sizes it is better to construct the backing and frame out of wood,like here:
http://truefresco.net/gallery/showgallery.php?cat=545&thumb=1

also for scratch coat you should use lime (you can use construction lime - or even simple factory bagged stucco mix) and about 10-15% of cement.