If its only scratched the lacquer, a decent pro repair could be to buff the lacquer down to the paint below, and re lacquer and buff back to blend.
The problems start when the metallic paint itself needs touching up. Its almost impossible to get a fair math with new paint, as the luster depends critically in what direction it was sprayed in the first place.
Even whole panel resprays dont looks as good as the original factory finish.
One of the reason old money tends to drive 15 year old ford sierras and the like ;-)