The blank I got is more than long enough for a 24 fret 'board and about 4 inches wide, 1/4 inch thick (sorry - I'm that old). Darkish charcoal grey in colour and slightly rough finish - a bit like worn out 240 grit glasspaper. To be honest it didn't look that encouraging. Yesterday I took an offcut from the blank, glued part of it to some Wenge (I'll see how that went when I get out to the workshop) and set about polishing another part. It's hard stuff. Worked down through the grits to 800, then some fine wire wool followed by T-cut. It comes up [i]very[/i] dark grey, not quite black, no sign of any 'grain' or structure on the face or edge, shiny and extremely hard. I did a completely un-scientific thumbnail test on it and couldn't make a mark at all, whereas the same test did mark a piece of Ebony (left a slight depression that I could feel)
If it sticks to the wood successfully I think I'll go ahead with using it. I'll let you know.
Andy
Ed. Just realised I haven't actually answered the question. You'd treat it like any other fingerboard blank for shaping, but I reckon it will be a longish job with lots of re-sharpening if you use block planes or scrapers, and messy with ultra fine black dust if you use sanding sticks