Retaining the existing concrete floors and exposed ceilings, gives a certain edge to this upstart law firm. Challenged by budget and acoustics, finishes play critical roles in this architectural strategy. Deployed on the floor, walls and ceilings, cork serves both metaphorical and acoustical purposes.   At specific moments this wrapper gives way to a mythical "nature" beyond... the thistle.   Other primary finishes include Panelite conference doors and industrial felt curtains.