I spray baste, usually on the wall in the hall. Most of my quilts are only basted for a few months. I do have my "waiting" quilt. It is a lap quilt that I take to Dr. offices or anywhere else that I have to sit & wait. It is over 2 yrs old. As my first spray basted quilt I thread basted it also. I did not need to. The adhesive is still holding.