There is an interesting old thread here about the Torres "papier mache" guitar. viewtopic.php?f=11&t=29408
plenty of good links/hins if you read the whole thing.
One point made in the thread that we are likely to forget is that paper back then was not the same as today. Even newsprint was rag paper rather than wood pulp. The Barcelona museum where the Torres is located has others from the same period so it was not a completely unique experiment.
Here is another video of the Verreydt guitar in this thread playing some Tarrega. The video shown some hints about the construction and load of pictures of the guitar.