I'm thinking this is a technique issue.
I clamp my backing to my dining room table using those binder clips you buy at a stationery store.
the backing is taught, no wrinkles, but not stretched. you just want it tight enough so you can't pinch it off the table.
when you spray, start at the edge of the quilt and spray toward the center and walk very quickly around the table spraying only directly in front of you and toward the center of the quilt. don't go spraying past the center.
You will go entirely around the table very quickly. Then place the batting.
repeat the process with spraying the batting and then smooth your quilt top.
if the quilt is larger than the table, then slide the entire quilt to once side and do what ever is left over that has not yet been sprayed, and then repeat with the opposite side.
the last step is to secure your edges. do this with small safety pins, or a martelli clipper or whatever you have.
I spray baste with 505 all the time and never have over spray using this method, and my quilts do not move and i don't have puckers.
the spray can should be about 12 inches from your quilt (no more). if you follow those steps you will not have any problems. and you will be a happy, ready to quilt so quick camper! :-D
there are pictures on the blog at Quilter's Paradise and very detailed instructions, so i hope you will visit and print them out. email me or post there with questions so all can see.
http://quiltersparadisecafe.blogspot...-how-do-i.html
hopefully the link will work this time!
Lisa