How can you tell it's concrete? Perhaps you can you the same function with the zone. Something like GLOB_WALL_SMASH_HEAD...
Seriously though, what you ask is, AFAIK, not available. Of course what I would like is much more difficult. That zones could apply finishes to the wall surfaces in the room. That way a continuous corridor wall can be one color on the passage side and different colors in the adjoining rooms.
