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I touch up stone chips every 2 years or so... old school method.

Tape off the areas to paint, use Porsche matched touch up paint, thin it down a little, apply with toothpick, let dry 2 days, wet sand with superfine paper, buff with rag and rubbing compound, polish. It does not look new but it does look way better. Just requires a little patience and elbow grease. If you don't like the results have it re-sprayed.