[CDKPhil]

Yeah I think it should level really well.
If you do a google search on epoxy floor levelling systems you should find quite a bit of info about it.
I guess it would depend on how viscous the mixture is. If it is too thick it might set before it gets a chance to level.
I would do a test on something else to see if it will level ok. The top of an old table or something, get it partially level put a bit of form work around it an fill it up. When it sets put the level on and see how good it is.

Cheers