I'll answer both. I put newspapers under the bottom layer of my quilt. They stick out of the edges about 12 to 18 inches. This takes care of the overspray I have. (don't let cats walk across the quilt after you spray. Their feet get sticky. Ok they are funny to watch walk but it's probably not good for them. Don't ask. LOL) I have taken up to three weeks to quilt a quilt and they are still sticking together just fine.