my reason for curing a part is because, like a bonnet, its close to heat and i heard that if a cf bonnet isnt oven cured, it could deform when fitted to the car so how does the mold not deform when its cooked with the cf part?



Much depends on what the moulds are made from. With the Uni-Mould system which is good for 90 Degrees (higher actually) I always run new moulds through a couple of heat cycles before using them for the first time.

 Epoxies will soften, well loose some of their  stiffness shall we say if exposed to a temperature above what they were initially cured at, hence post curing. Ideally the part should be post cured to a temperature slightly higher than its final working temperature.
In reality most parts will post cure in use without major problems. So something like a bonnet would actually post cure itself over time.
Just don't leave the car parked in the sun all day fresh from the mould.
To get an idea lay up some flat sheet and let it cure at room temperature, say 20 degrees. Demould it and then put it on a radiator (with the heating on ) in the house for a few hours and see how it becomes more flexible.

Warren

Carbon Copies Ltd