How to Repair the Rubberised Curtains of a Shutter

A simple way to repair the holes (more or less deep) in the rubberised curtains of a shutter. Often these holes are located on the second curtain, that is rolled up when the shutter is not cocked, causing annoying light leaks. With a little patience it is possible to repair it, reviving cameras otherwise destined only to be shown in a cabinet.