Dear OP, thank you this is certainly interesting.

I've had the experience several times that my teeth and my whole mouth would turn to a weird substance like stone, its hard to describe since its a very strange feeling.

Anyways, I want to achieve astral projection I hope I can do this by work on the etheric energy body which I do. One time i got so close i was starting to see through closed eyes and thoughts would become REAL projected imagery like television.

I raise my energy in the energy body by focusing on my body as a whole or parts of it as such as a leg. Then the energy body surrounding it will expand and I think all-in-all its like body building but for that energy body. So when using it, in theory skills such as astral projection and clairvoyance should develop consequently.