So, there are rules for making magic walls. To wit:
"Magically Treated Walls These walls are stronger than average, with a greater hardness, more hit points, and a higher break DC. Magic can usually double the hardness and hit points of a wall and add up to 20 to the break DC. a magically treated wall also gains a saving throw against spells that could affect it, with the save bonus equaling 2 + 1/2 the caster level of the magic reinforcing the wall. Creating a magic wall requires the Craft Wondrous Item feat and the expenditure of 1,500 gp for each 10-foot-by-10-foot wall section."
Currently my group is locked in a discusion about weather you can give the wall special properties like a weapon or armor (in this case ghost touch).
Can you use these rules in this way? If not is there any way to give walls magic abilities?