For you, a continuation of my reply to civilbloodshed, since I forgot something.
I said:
Scattering (reflectivity) or absorption-and-reemission might do the trick though, but that's even more speculative with respect to nuclear physics.
Reemission has a bit of an edge here, I think, because at least Zebra-Man's belt keeps changing colour between yellow and white.
So you want to look for a particle interaction that takes energy (momentum, in this case) from a "zebra particle" and converts it into electromagnetic radiation, or maybe electric current flow.
This is not an obscenely stupid idea; piezoelectric crystals do this quite naturally when you squeeze them (you can squeeze them with a blast of particles! which is sort of what your finger is!) so perhaps the *belt* is responsible for some of the arcing (panel 3 of page 8, for example -- maybe it's drawing what the observer *sees* -- electric arcing between two huge yellow piezoelectric "generators"; except Zebra-Man's belt is white there, and it doesn't fit with page 11, although there is yellow in Batman's chest patch, right? Hmm...).
On a scale of entirely plausible to Doctor Who, this comic is somewhere towards the middle. :-)