I would try a normal scratch removal product...ie, "Scratch X". Buff it in really well, let it sit, buff it out. If it doesn't do the trick the first time, repeat the process. Also, run your fingernail over the scratch, if you can feel a noticable burr in the paint, that means that the scratch runs somewhat deep. Either way, try a scratch removal product, it should take care it for the most part.