[BwanaNdege]

If cured in a furnace, upon cooling the mandrel would shrink sufficient to aide removal?

Good idea! Possibly.

Burt Rutan used a tapered aluminum street-light pole as the mandrel when winding the main wing spars for his 'Voyager' (Round-the-World-Non-Stop-Non-Refueled) airplane.

If you want to"wind your own", check out this:

http://www.xwinder.com/

[Moonman62]

Boeing spent a fortune to get the production process for the half carbon composite 787 correct.