Found a new material for helping to carve a minicell seat. It's the material used for stripping the wax from floors in commercial buildings, like an extreme duty scotchbrite pad. Once the basics are carved with a grinder this works very well at smoothing out the contours and making it look like it wasn't carved with a chainsaw 
I work in a hospital and the centers of the discs housekeeping uses to strip the floors with the buffers they toss, so if you are around a commercial office building of any kind you should be able to get them free.
Bill H.
