Porsche paint is quite soft, I've had mine buffed away with a high speed buffer by a professional. The idea is that high speed rotation creates heat, heat melts paint, slightly softened paint covers scratch, add another layer of clear coat and you're set. Down side is that the paint does get thinner but if unnoticeable, who cares?

My cut wasn't too deep and the color is easy (speed yellow), so not sure if it'll work on yours as well but worth getting an opinion.

Cheers man, you're the one driving the Porsche, not the bxstxrd who scratched it.