Longevityn of carbon skis

Some of the resins used in the bike industry are handling around 650deg F, so they are certainly out there.(essential for handling braking heat whilst still holding high pressure clincher type tyres on the rim)

So is it right that since Epic went to their own premises that they no longer have storage facilities for prepreg and no longer post cure any boats?

Post-curing wet resins and curing prepreg are two completely different processes. You can post-cure a wet resin simply by building a simple oven that will heat up slowly to the temp you want, 150-180F usually. And you actually want to heat it up very slowly, to allow the cure to stay ahead of the temp rise, so you don't need much heating capacity. It is usually done after the layup is already cured, so you don't even need high-temp molds or vacuum bagging systems, you can just remove all that stuff and put the finished part in the oven. In other words, no big deal.

On the other hand, prepreg requires a much more sophisticated system, where you have to ramp up to a certain plateau temp very quickly (to liquefy the resin and allow it to flow properly prior to curing), then hold at that temp for a specified time, then ramp up again to full cure temp, then hold at that plateau again for a specified time. So you need a much heavier duty oven, and an electronic control system to run it, and usually a good inside air circulation system as well. And you need molds and vacuum bagging systems that are designed for high temp use. So it's not at all as easy as just a simple post-cure. But there's no doubt the end quality is much higher.

I'd be interested to hear what resin system Epic (or any other mfr) is actually using, just for curiosity's sake.

No, Epic past cure ALL their boats.

I found a bit on the web where Wests systems claim Epic use their resins, but that my be old and they may have changed that.

Wally?

Interesting, standard West Systems has one of the lowest Tg's around, only 140F or so IIRC. I'd be surprised if they haven't gone to a higher Tg resin, at least for their black boats.