If they're legit scars, I highly recommend using Mederma on them daily. It will take a little while to make the scars completely disappear, depending on the depth and severity of the scars, but Mederma is working wonders on very deep scars on my arms, as well as the stretch marks on my thighs. I've been using it on my arms since November, and my scars are half as visible as they were before I started with the Mederma.
As you wait for the scars to go away permanently, there is something you can use to conceal them daily.. Dermablend is your friend! It's a bit on the expensive side ($20 for a lipstick sized tube of it on Amazon, but it goes a long way)It lasts all day and is smudge resistant, but it is easy to get off at the end of the day