As a casualty of my work creating a fiberglass aft canopy fairing, the back of my canopy has some nasty scuff marks. The sort you would get from scuffing it with sandpaper or scotchbright

I've tried several applications of ClearView polish on these, but the white-ish scuff marks remain.
They're over the back of the baggage compartment, so not an issue in flight, but still a cosmetic blemish. Is there anything that I could use to buff these out, so that they show less?