There are two reasons I don't use 3M spray adhesives any more: First is that the overspray gets everywhere. I've even had it show up on the other side of the paper I was spraying it on while the paper was laying flat on a newspaper. For some reason, that stuff seems to be worse than spray paint when it comes to overspray. The second reason is that I've had the stuff want to glob coming out of the nozzle too much. Sometimes it is a real challenge to get an even coat on whatever you are spraying. As a result, I've found that a thin layer of Elmers white glue is more effective and much easier to clean up after (as Jeff said, keep plenty of water and paper towels handy for cleanup).

Greg