[CAUT] fire extinguisher dust

[Don McKechnie]

List,

Over the weekend some idiots broke into a piano faculty studio and 
discharged a fire extinguisher all over the room. Of course, the dust is 
all over and in the pianos. While I understand the chemical is 
considered and irritant to humans, I wonder what it will do to the piano 
in the long run after clean up. Any experience out there with this kind 
of situation?

Thanks,
Don McKechnie