If there is a lot of scars, I doubt the cat excuse will work, but you may get lucky. This is yet another example of why one shouldn't cut themselves..
However, there is a ointment for this, I'm not sure of the name, it's something like Scarderma or something, and you should be able to pick it up at any store. It supposedly reduces the visibily of scars.. Just tell the guys in the medicinal section what you want, and they should be able to help you find it.