i see everyone is just suggesting you throw it away, and while i tend to agree as dealing with corpses can be messy and dangerous business, i know my curiosity would never let me leave a catch like that to go to waste. hmm. i have often 'played with' bones i have found from this and that, mostly in the forest behind my father's house. shrew bones, rotted bear's jaws, deer skulls and moose legs. it is certainly dirty work to do anything with them, but the basic procedure i'd take would be to get some disposable thick latex gloves and a mask from the pharmacy to wear while you carefully hack away any excess meat and tendons with an old knife or blade (which will either be exclusively for this task, or thrown away afterwards!). be sure not to flick bits on to yourself. afterwards, i'd take the whole thing and throw it into a bucket with undiluted bleach outside, cover it and leave it there for a few days until the bones turn white. remove, rinse, scrape and repeat if necessary, lay them out in the sun to let the bleach break down and voila.
this is by no means the best way to do this sort of thing, and all the bones will wind up to be brittle. it may damage any smaller fragile bones as well if you leave it in there too long, but if you are thinking of painting it, the surface the bones will be left with afterward will be perfect for accepting paints or inks, white and matte. you could then give them a glaze coat to seal the paint and coat the porous surface.
anyways, if you do anything with it all i can say is be careful, wash up well afterwards, dispose of any tools and don't get bleach on your shoes. oh yes, and be sure and post pictures. ;P
