I just can't stand pin basting quilts and learned this technique from Libby Lehman who uses 505 to spray baste even her largest quilts. This is now my preferred method since crawling around on the floor is just not fun. Anyway, yesterday I noticed a free video at The Quilt Show which demos the method and answers a lot of questions about the method including how it works with various battings, etc. Thought you might like to check it out.
http://www.thequiltshow.com/os/blog.php/blog_id/2566