I could not find ant technical info about this process, so I tested it out with a small part in the composites lab.
It took me a couple of tries to get it to feel light, in a complex large mold I would not attempt this method for a low volume run as there is a learning curve and cavities would be hard to detect.This would work perfectly well for a cosmetic part(like a body kit) though.
Fun to learn new things every day