What do you think about these heating fabric? looks interesting.
Very interesting. I have been looking at re useable silicone bags via Alan Harper, and have seen his integrated heating element in the bag material as a nifty method as well.
Bare in mind that has a max rating of 180*. If your post cure steps require a higher cure tg, then this won’t dial you in fully.
Still very cool.
The one I spoke of claims sustainable 240-250 deg. Celsius.
The problem silicon bags arent cheap. 180ºC should be enough. Standard aeronautical prepreg postcures are 177º. Low temp postcures are 100-120º
In my case i would require about 10000 to 12000 watt (wing mold). A bit too much
Got sun? 
With sun you cant get a progresive temp ramp upI would say
In Ireland, we could produce approximately 2 small parts per year using the sun-curing approach
Well, if you have a PID system and fans, you can beam the sun on a collector (steel plate) and control the heat that way. Else change how much sun hits the collector plate, via shade, or unfocused lens system.