paint ball guns?

Ok - I am throwing out a challenge to readers of this blog:

How can I use paint ball guns as an effective weapon against zombies?

Ebob Miniatures makes paintballers and if I can figure out a cool way to include them in a game AND make them useful against zombies I might just get some.

 The paintballs are made from gelatin capsules - so the payload can't really be anything useful.  I had thought of flammable liquid inside the capsules - fire a whole heap into a group of zombies and then set them on fire with a flare or a Molotov cocktail.

 I can't see the paint being useful to blind the zombies, so something else will have to be used.

So - the challenge - who has a great way to make this idea work?