What can help reduce Stretch Marks?

When i was Pregnant in 2006 i used Coca Butter on my belly..Well I never used it anywhere else. I do not have Stretch marks on my belly but I have them on my boobs, my sides, in between my legs and ofcourse on my butt. They are not that bad but I can still notice them. I have Tried coca butter on them but that has not helped. I also bought some other lotion Palmer's It's like coca Butter but it is esp. for Stretch marks to see if it would help and that has'nt. What is something else I could use to help reduce them?