Start off by just washing and claying the area to see it more clearly and possibly remove any paint that has rubbed on to your paint. Then start off with a polish and see what that does. If that doesn't work you can try more aggressive polishes or move up to a light wet sanding (i.e.
Meguiar's 2000 Grade - Unigrit Finishing Sand Paper). After wet sanding don't forget to polish afterward.
Greg @ DI