If you try out the sculpting again bud, just roll out a very thin sausage of GS, then wrap it in a ring, once around the top of the models head. Make sure your sculpting tool is well greased/oiled or I use washing up liquid, then flatten the ring into a band. After that its just a case of taking nick out of the top of the band all the way round, maybe running a line or two around it. Viola!
Hope that helps!