Thanks for both your replies! If the admins don't kill me for trying it, I'll do that, thanks Jazz!

I need to contact Trelleborg for some of their tooling board. I worked for a company called e-Go Aeroplanes last year (who make carbon fibre microlights), and Trelleborg supplied us with tooling board, which was then sent directly from them to a CNC firm who made all the patterns.

The tooling board is a low density epoxy, the chaps at Trelleborg actually include optimal machining conditions in their datasheet!
http://www.trelleborg.com/upload/Tre...678-Lo-Res.pdf

(This is the stuff I used at e-Go, and the stuff I hope to get off Trelleborg).