>I thought that the texture was essential to the function of concrete
>perches.  Seems like concrete worn smooth wouldn't work to file the
>nails down.  The idea of handing the perches over to Charlie and his
>beloved power tools is MOST appealing, though.
Just a comment here...using a wire wheel on poopy concrete is BOUND to
make dropping dust. As we all should know, this is not a good thing to
inhale. If somebody *does* use a wire wheel or grinder to clean dirty
perches, be sure to either do it outdoors, or wear a high-quality face
dust mask to prevent inhalation of dust particles.
--Kathy
 * SLMR 2.1a * 
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