Is shark oil really effective for the removal of old scars ? (photos)

I have these old scars. The biggest one is in my knee, as seen in the picture, I've got these on a motorcyle. Although it isn't that visible on the pictures, but those old scars leave some dark spots on my legs. And I'm losing my confidence for that. My classmates always told me that my legs are just like those on men. And right now, I have these another fresh scar on my foot caused by a super hot wax. Please help me. What are the products that I could use to eliminate those scars ?