How about using bigger sections and less glass in the resin?
With 45 pct glass, you will suffer rapid mold wear even with the hardest steel, and the fibers will probably not orient like you wish anyway, so you will probably not achieve what must be a strength objective.
If the part doesn't have to fly, a little extra weight might make it more satisfactory in every way.
Mike Halloran
Pembroke Pines, FL, USA