well, you can never fully remove the stretchmarks. you can only make them less visible.

I got my stretchmatks first when I hit the puberty and was built like a little boy and then practicall overnight my body became totally different.and then couple of years after, I got into crisis and lost a lot of weight one summer. so now I have stretchmarks on my thighs and the side of my belly. oh, and my breasts too. I tried a lot of lotions out there but none of them ever removed them but they used to be extremely reddish/purpleish but then they just got whiter and white and blend in with my natural skin color. but they never fully disappeared.