all the uses of regular hide and bones.
fuel, bone glue. though i'm not sure about the glue part.
leather. Pig leather is really damn strong, i've got a pig leather jacket that i inherited from my grandfather, it's still going strong.
also, when cleaning the bristles off the skin, you can keep them and use them to make brushes. There's a lot of uses for good brushes, be it brushing off dust, or applying oils and other chemicals.
think creatively. Don't waste anything, even if it seems like some things just don't have any use.