I've tanned a few of my own now and its fairly easy to get something functional although I tried some goat skin without much luck this year. Our abattoir will salt them for me and I pick them up with the lamb a few days after slaughter. I then deflesh them with a sharp knife and lay them out with more salt on for a few days. Then I use an oxalic acid solution for the tanning (easily available as crystal to dissolve in water from ebay) - paint the solution on to the skin a couple of times a day. Then wash them in washing soda, dry and stretch them and comb. It takes me ages to deflesh - I can manage one skin an evening but the rest of it is only a few minutes here and there which I fit in around all the other jobs. Its a very satisfying process and one I'm looking forward to improving with this year's lambs!