I had asked this question on another site also and was given this link to reference to.
http://www.youtube.com/user/suzannej.../1/oUXeutmXDJY
I'll have to ask Mom what she plans to do with the squares. It seems it's doable to use cloth in some instances. Maybe these squares would be better as a quilt wall hanging, if hung out of direct sunlight.
Anyway, thought I would share one thought that someone had given me in case anyone else was curious.
Becky