You're making perfect sense, Linny. Spraying is just a different technique and it DOES have great results, especially good for creating shadows and adding dimension to pieces. Look at some of the work by Colleen Wise for examples.
http://www.colleenwise.com/gallery2.htm She recommends using a 50-50 bleach and water solution and spraying from a height of 12"-18".
The stamping/marking technique doesn't involve spraying at all. You use the bleach compound like you'd use a stamp pad, so yes, you'd dip the potato masher in the Soft Scrub and stamp the fabric with it.
Does that help clear things up? Different tools in the same tool box.
