Originally Posted by Shedofdread
To be sure, I'd need to see the entire drawings. Though just a guess is 5-6mm would be needed and probably a couple of layers of 200g glass (carbon better, though). Don't forget - set hard points (for bearings, attachment points etc.) into the foam before you laminate the skins on. Pierced foam may be better as resin can form bridges between the skins to resist them peeling off.
Richard,a google of pierced foam got me a lot of info on cleaning my Prince Albert
& a link back to here!
Do you have a link to a supplier?