[SantaMonica]

Yes I believe you can use fiberglass window screen, but you then need a frame for it. Might be easier to use a rigid screen like those linked earlier, or the pre-seeded ones from IA.

Not sure how an angle would be easier... you still need good controlled flow coming from the spraybar, and that seems the tricky part. I was just thinking about those tabletop ornamental waterfalls that flow down a sheet of glass; maybe I can use the spraybar from one of those.