Question about how Ectoplasmic spell works?

[Malhavocblackthorne]

If you were to use the metamagic feat Ectoplasmic spell with the wall spells would you be able to make buildings inaccessable to incorporeal or ethereal creatures? aka almost like a ghost touch wall?

[Nefreet]

Ectoplasmic Spell.

Quote:

Your spells breach the gulf between dimensions, sending ghostly emanations into the ether.

Benefit: An ectoplasmic spell has full effect against incorporeal or ethereal creatures. An ectoplasmic spell uses up a spell slot one level higher than the spell's actual level.

Sounds like a neat combo to me.