Has anyone got any experience with using cork as a core?  Several kayak manufacturers have started using it recently and was wondering if anyone has any experience with it as a material for both vac bag and infusion?

Also, on the thought of preparing the core for infusion, the Amorim stuff I have doesn't appear to be 'prepared' in anyway. It looks like your regular run of the mill cork board. No obvious holes or scoring. Just the random 'channels' that normal cork has.