I was wondering about unraveling natural fiber sweaters that I find at Good Will, Salvation Army and the like. How would you go about the unravaling (where would you find a place to start)? And what would you have to do to reconditon the yarn? I assume you would do something different to cotton, wool, silk, linen, etc. You can pick up some interesting stuff at the thrift stores for next to nothing. There's always dyeing if you don't like the color as well.