Hello to all, thank you for your words
Harry, well, I cannot say with security where to find cork in it USA but you possibly found it in the stores that they sell products to decorate the house: paintings, wallpaper, etc the cork is used as insulating.
Alan, I Consider that the construction phase this completed one, I believe that to show the pieces before painting can be useful to see what materials I have used, the textures, etc
JAsper when I has the pictures of the painted piece I will put it here also
cheers
Carlos