scratch

I've bought Surface few weeks ago. Most times I've taken it with me in special cover which helps to avoid damaging. But today I've seen many scratches on its rear body; it also contains some stains which aren't scoured. Is it possible to remove scratches by using some "paint" or other tip?

Of course just my poor luck. I fell asleep last night with my surface book on my bed. Ended up pushing it off my bed in my sleep. I wake up to my surface book on the floor and a scratch on the outside of the tablet. Since I'm pretty sure the tablet is coated with some kind of paint I think...