site convinced me to try it. You can easily trace onto it with a permanent marker. Then you peel off the backing and you have a sticker that goes right on your fabric. It's very easy to sew through.
You wash it off by swishing it around in warm water (thus, not so good for wool thread). It takes some work to get all the Fabri-Solvy out, but it does come out. In fact, the linen T is hanging in the basement, drying after I swished it for a while.
Now you know what I'm going to be doing this weekend! (And work. I am actually bringing home my work computer.)
Hope your long weekend is nothing but fun!