Hi Carl:
The following is from the System Three Epoxy Book:
“Epoxies formulated for coating and fiber glassing are too thin to serve as gap-filling adhesives. They can be modified by the addition of thixotropes to form non-sagging pastes very useful as gap filling glues.”
You are impregnating the carbon fiber with epoxy resin, I do the same thing, but with fiberglass cloth over marine plywood for boatbuilding.