Petroleum Jelly is what works the best for any and all scars/birthmarks. I had hernia surgery March 12,2009 and I had to wait longer than usual for healing(i'm diabetic)so now I can put something on the scar for lightening it up.
I have been using a creamed petroleum jelly that I got at the .99 cents only store just this month, and after a week of using it every other night or so. My scar has diminished and it has become less big and bright. I hope you understand what I mean.
The scar was a reddish color due to where it was and I have also used it on my old stretchmarks from my own baby (17 3/4 yrs old) and they have lightened up too. Its in a blue and white 6 oz. tube with a flip top lid and its a non name brand from the .99 cents only store. I hope this helps.
W. H. in Sacramento,Ca