Lime from the garden center or Tractor Supply works fine, but can get messy. A couple pounds in five gallons of water usually does the trick. I have also used pickling lime from the grocery store. I have not noticed any bad odor in mine. I just flesh it to get the meat and fat off and then soak in the lime. While it is soaking, the inner membrane usually fill with the water and swells, making it easier to get off. It takes alot of rinsing and ringing to get the lime out. When you think it is all out, rinde it a few more times.