He has stitched uni-directional glass, only issue is its backed with mat. I have heard epoxy is not compatible with mat, but have used it before with no issues.
I doubt if will be a problem, the matt is stitched on to promote adhesion, as the matt has better
bonding characteristics than weaves. this is for poly and vinyl. Not necesary w epoxy which sticks very well on its own. problem is that the epoxy doesnt break down the glue that holds the mattfibers together
so its tough to tell if you have good saturation, other than that it should be fine.
another disadvantage to the matt backer is that it makes the cloth a little less pliable, so it may resist taking the shapes you are trying to make, only adding to more bodywork later on because it didnt form as tight as you may have liked. Sorry to be
so technical, but the extra material it takes to wet out the matt would be better served in another layer
of cloth or weave. just my 2 cents, only trying to help