Lay a piece of sheet metal onto a flat surface. Measure the width of the direction that you will be rolling, using a tape measure. Record the measurement. Obtain a piece of metal piping that is 2 feet longer than the width of the sheet metal.
Measure and mark four equally spaced holes on the sheet metal, using a black marker. Drill the holes, using a 1/4-inch metal drill bit.
Line up the pipe with the holes on the sheet metal and drill into the same locations on the pipe.
Lay the sheet metal over the pipe and secure the two together with sheet metal screws. Slide a washer over the screws and tighten them with a wrench. Repeat the process for all of the holes.
Lay the sheet metal flat, with the pipe facing up. Ask an assistant to grab one end of the pipe while you grab the other. Roll the pipe over the sheet metal. Grip it firmly until a complete turn of the pipe has been made and the edge is rolled. Loosen the screws holding the pipe in place. Remove the pipe. Repeat the process for any other pieces of sheet metal that need to be rolled.