http://www.equilters.com/library/tips-hows/starch1.html
I just googled "spray starch and bugs" and this site came up. Wow! Lots of comments on using starch on quilt projects and some on bugs, silver fish.
These are comments by quilters and goes right along with this topic.
Okay, I've got to go read some more but was excited when I found this. Love to see what others are saying.