[Peter86]

I recently had a similar problem.
Bought some Meguires 2.0 scratch x. By hand it didn't seem to do much so I put it on my car polisher (cheap one) and would go at it. Stop check progress, go again and over about 20 minutes on and off it took them out completely. Don't forget you then need to use a Polish afterwards, then wax or what ever you want to use.

Just be careful you don't go too hard at it or you will cause more damage. Also if the marks are too deep you may need a bodyshop to correct it.