Thank you so much for posting the video, Jan. It occurred to me as I was watching the video that I have no walls inside my house that i can do this on. What to do, what to do?! I am going to go to Home Depot and buy some of the large foam boards and then cover them with flannel. These can be stored in my garage. Then I can bring them out and place them side by side outside and then proceed as the video shows. This way I also don't have to worry about the spray getting on other items and furniture inside. I am excited about this and sure hoping it will work.