Removing scratches from the back of the seats
 

During a recent weekend excursion, my passenger front seat managed to get a prominent scratch down it's back (the plastic part). The scratch is just barely deep enough to feel with a fingernail, but the permeation of the plastic makes it more visible than I care for. Are there any products or techniques I can use to reduce the appearance of this scratch, if not get rid of it all together?

Thank you!