I have a flannel covered design wall that is a single layer and close to 25 years old. The only thing that is not so "hot" is that the white flannel is no longer snowy white because of use, environmental dust and over spray from spray baste (my fault, and lesson learned.) I use a cloths brush on it from time to time to clean off the little threads and away I go again. Love it and use it ALL the time. A wonderfully useful tool.