[Augster]

That material would be great for areas where limiting light penetration is needed.

Not sure if a sump would be such a place since it would seem you want to be able to ensure there are no critters and such down in the dark crevices or blockage within the baffles, and that's where clear panels would aid in visual inspections...

Great looking build tho!

EDIT: I was formulating a reply before you posted additional photos of a sump with a clear front!