"I got an alphabet poster for a teaching store and used rubber cement to paste it to the metal. The oil pan had a grease coating on it which came off with SimpleGreen. I didn't want to put (or try to put a hole in it for hanging) a hole in it so I use the 3M picture hanging velcro." Would love to paint this with chalkboard paint. Could then stencil letters/numbers on to the chalkboard paint.