For years when I've done satin-stitch applique I've used stitch-n-tear by Pellon as my stabilizer so that the block doesn't get all wonky.
What I had in my stash was very similar to a sew-in interfacing except that it would tear easily when going with the grain. Cross grain though was always a different story.
Well I had to go buy more over the weekend and found that Pellon has changed what it is like. It is now much more like a real heavy weight paper and is a lot stiffer than the old stuff. Removing it is much easier than the old style of the product. Something that I'm thankful for.
Because it is expensive stuff I cut 1" wide strips of it and use it only right under where I'm stitching. Even doing this though, I've used 3+ yards (it comes 20" wide) on the heart quilt that I'm currently working on. I'll be stocking up on it again this weekend when it goes on sale because I have two more applique quilts to make that I will need it on.
I know that there are stabilizers that you can leave in the block after the stitching is done, but I don't like to do that because I don't like the extra stiffness on top of the wonder-under that I've used to adhere the applique.
1. The customer for the next commission quilt wants me to make her quilt (appliqued origami swans) with scraps, what fun!
2. Safe travels to work in rush hour traffic.