Or regenerating my Monty Python and the Holy Grail Dead Collector so he's a better Eric Idle/Dirk McQuickly/12th Doctor. Originally I took off his hat and built up the back of his head and hair with Liquitex Modeling Paste which has held up but has chipped over time. This time I'll be using Apoxie Sculpt.
Before
The white is the modeling paste
Taking the paint off
Raising the hairline.