Feel the scratch with your finger. If your finger nail dips into the scratch, then the scratched has pierced the paint and you will need touch up paint. HOWEVER, if you feel it with your finger nail and it feels even with the surrounding paint, and smooth over the scratch, then all you need is a mild rubbing compound like Meguiar's ScratchX (
ScratchX® G10307 Product Information) . Use the ScratchX with a foam applicator pad (
Soft Foam Applicator Pad X3070 Product Information) and forcefully rub the ScratchX into the paint. After about 3-4 coats, the scratch should go away.
Hope this helps, and sorry about your scratches.
P.S. You can pick up touch up paint at any auto parts store like Pep Boys or AutoZone.