I made my own starch this weekend, thanks to all the ladies here. I wanted to starch some yardage and decided I didn't want to spray it. So got a container. mixed up cornstarch and water (cold from the hose!) and dipped my fabrics in, making sure they were well coated. Squeezed them out gently and put on clothes line to drip dry - smoothing them out. I now have starched fabric which needs very little ironing because it dried flat on the line. (Oh - I had previously washed and dried the fabric in the dryer for shrinkage and to get rid of the sizing.)
Dumped the excess starch on the grass, sprayed out the container, and done!
The only thing I think I would do different next time is make the starch heavier.
Am using the fabric very soon, if I can ever stop goofing up on my current project!