Raccoons...tell me about it. I've found paintball guns are most effective in "raccoon repelling". Unfortunately, I've yet to find a way to freeze the paintballs, or find marbles of the same diameter as a paintball. Oh well. I used to have a bass in a pond outside, and he got eaten by coons (he was a sweet bass, believe me, he'd let you pet him and stuff...it was awesome), so since that day I've been looking into the most effective way to piss of raccoons. The paintball gun seems to work pretty well... I've heard of people putting cayan powder on their lawns when the coons are pullin up the grass. Perhaps you could create a cayan paintball, or some way of utilizing cayan... Oh man, I need to fish more...
-Brian