This might sound like a bunch of Bull shit, but im SERIOUS here.....try "Preparation-H" on those stretch marks. It wont totally get rid of em but will reduce them a bit. I learned this trick from my wife, she actually puts it on her face to reduce wrinkles. I tried it on my marks under my arms and it did reduce them. put it on while you sleep, and remember the shit stinks so dont use it when you are spending the night with anyone special...
Peace