Back with my results, in case anyone else wants to use this product.
I used Aleene's Fabric Stiffener & Draping Liquid. I diluted it by 50% with water in a small bowl. I put the lace in. Squished it around, with rubber gloves on. Squeezed out the excess. Set it on plastic wrap and formed it into the shape I wanted, blotting with paper towels, making sure that no holes still had liquid in it. I used a tooth pick to shape the tiny areas.
When it was dry, I rinsed it in hot water. It felt too rough and stiff. (The directions didn't say to do this.) Blotted it with paper towels and set on plastic to dry. When it was dry, it was stiff, but not scratchy rough to the touch.
I'm satisfied with the way it turned out. Plus, I learned that if it gets wet, it shouldn't lose it's shape~