Gator sander and 2X Gloss- made it possible.

Submitted to Community Chat

Reattached the cup parts back together with superglue.
Deliberately left the handle off.
Filled any missing seam cracks with air dry clay.
Filled the inside glued seams ( to waterproof) and the outside mug handle attachment cavity with epoxy putty.  
After the putty repair cured -sanded down much of the raised excess with a dremmel.
To get a good contour sanding the GATOR detail sander was next used. 

Decoratively painted to disguise the repaired restoration and sealed with 2X gloss clear.
Now have a perfect little 🦉owl 🦉planter made from a busted mug.