Over time, your rug may discolour due to natural causes, like sun bleaching, or accidents such as spilling nail polish. In these cases, pile shearing can bring new life to your rug by removing a small layer of the discoloured pile, revealing fresh colour.
This restoration process is effective only if the discolouration is on the surface of the rug and has not seeped too deep. Take a look at this video to see the results of pile shearing on a sun damaged Persian rug. The difference will amaze you.