Challah cover test run

Next week I'm helping in an 8th grade religious school class. We're making challah covers. It was up to me to choose a way to make them, and after some research, I decided on painting fabric with Shiva Paintstiks. I've got some simple black cotton fabric that's been washed to remove the fabric sizing, and I've cut and hemmed one piece to do a test run. Using the basic iridescent set of colors and a couple of rubbing plates, I've quickly made this challah cover. It's somewhat messy and hard to control, but I think it has a nice look to it--except that I didn't leave enough room for the "shin" in shalom. :-)

After drying a few days, I'll iron it or toss it in the dryer to set the paint.

Anyone out there in blogland have suggestions on how to quickly hem up a dozen more pieces of fabric?!