Pieces to be tested:
FAIL. This corona discharge thing does not work. After I have increased separation from 1 mm to 3 mm, and chopped off half of the corona wires, it kinda started to work. But not good enough.
Looks like my corona wires are too thick, corrugation may have been a bad idea (effectively makes them even thicker), and the mesh is too coarse (the only one I have).
Most of the time, it arcs or sparks instead of corona.