I am *not* the luthier.  My son recently bought an oud, which is a guitar family instrument that looks like a fretless lute:

http://www.touregypt.net/images/touregypt/oud13.jpg

The luthier, who’s Arab, told my son he was looking for a way to easily thin down 4mm veneer stock to 2mm thickness.  Is there a machine or a process to do this in a straightforward way?