Look Up 'Vacuum Bagging', that type of gear is what you need
to get the air bubbles out of the Epoxy while it cures ,

USCG Helicopters blade maintainence crews use that sort stuff to maintain rotor blades.

and heating the part in the mold in the process while in the curing process
is also part of making the part strong enough.
(old pizza ovens?) set low of course...

[to risk your face-plant on]