How to select all faces that have no texture? I have a barn on which I have nearly finished the texturing, but there are many untextured faces, which all need the same texture. There must be a quicker way than manually selecting each face. 

This image shows some of the untextured faces:



Note that I'm not using materials.
Select one of the faces which doesn't have a face texture assigned and press &#8679; ShiftG> Image.