I'm a huge fan of paintball, gave the game up a few years ago though (too expensive). Ironically I just watched a video of a match a few days ago and I caught a glimpse of some photographers that were on the sidelines (but not behind the netting). They had bubble wrap (that packaging material that is fun to pop) wrapped around the lenses. It looked like they had some room to slip their left hand under the wrap in order to operate the lens...I guess that would be sufficient. If you wanted to cover the body as well you could probably use some of the smaller bubble wrap (the "bubbles" on the bubble wrap on the lenses were one of the larger sizes) or just a t-shirt. Hope that helps...Happy shooting.
