My first scratch perturbed me, but if the case is made out of polycarbonate, then it is bound to happen. The same material is used for eyeglasses and while they are very hard to crack, they do scratch like a mofo, even with special coatings. Polycarbonate can crack, but it is rare and has to do with extreme pressure and heat.
My suggestion is live with the scratches. I work at a LensCrafters and trust me, if there were some miracle compound that completely removed scratches from polycarbonate, we would be using it every day. In the end, the kits you see sold are mild abrasives or something that fills the scratch. To actually remove a scratch, it has to be a hairline.
People complain about the scratches, with eyeglasses and iBooks/iPods, but it is much more durable than the soft plastic seen on cheaper laptops.