jmfox,
While cosmesis may be an issue for you, this cap protects the lights and wipers from falling debris, which has been minimized by the C series limited FEL roll back.
Overall, the toolcat is not a sexy beast, just a darn useful one, and it is for this last reason that I purchased mine. The aesthetics of it were not part of my purchase decision.
I doubt that you will find anyone that has permanently removed their work lights, especially for the aforementioned reason.
And you are correct, the C series shade is ABS plastic.
Cheers!
Steve