A fairing fragment provided an excuse to practice plastic polishing:

That’s from a EZR-SZ Zzipper fairing ridden about 2000 miles a year since 2001, so it’s spent far too much time in the sun and definitely not gotten all the finicky care it deserves. It’s tinted 60 mil polycarbonate, vacuum-molded into the bubble shape required to fit on a Tour Easy recumbent.

On the other paw, Karl Abbe (the guy behind Zzipper) says the typical fairing survives maybe half a decade, so it doesn’t owe us anything.
I applied all three bottles of Novus Plastic Polish in descending numeric order, using snippets of Official Polish Mates (which could be a Krakow escort service) with a vigorous circular motion, ending up with a reasonable result:

I cut the smaller chunk from the fairing for comparison. It’s been washed to dislodge loose crud, but is otherwise as-ridden.
The fairing has deeper scratches than Novus can buff out, but removing the surface scuffs and haze definitely improves the clarity:

The view from father away:

Eks describes this sort of thing as a “Used Car Finish” = high polish over deep scratches:

All in all, a nice result from very little effort.
The canonical Novus Polish application is removing the haze from plastic headlight covers, but our decade-old Forester is a garage queen and the headlights remain in fine shape.