Prehistoric Native American Spiral Pot

This model is based on a scan available from http://hampson.cast.uark.edu/ . The Arkansas museum has scanned their large collection of prehistoric native american pottery and made the scans available for download.
The scans are beautifully detailed, but unfortunately in their raw form they aren't printable. The scanner can only capture the outside of the vessel and so it provides only a non-manifold surface which can't usually be printed.
I brought the original scan into 3Dcoat, solidified