Because the other layers were freezed, you don’t see the rest of the scene.
Here I post a new shot with all the layers visible 
I think that now is ready for texturing…so, again I have to confront myself with this problem…
This, I recognize is my week part…but I try to improve it :p
Aaaa… by the way, haw can I make metallic shaders, I’m asking because I tried to make some of them by fixing the blinn material specular shading properties and the results are not satisfying.
So some advices are very welcomed.
"Imagination is more important than knowledge" A.Einstein