Hey all, 

Been having problems,
One of my staff has been laying up some new moulds (vinylester tooling), and despite post cure and 10 waxes, the prepreg is sticking badly.
So much so, that we have to break the part to save the tooling, to the point of literally ripping it out.

What the hell is the issue?
over cooked? tooling not post cured enough?

Pics attached for reference