The one caveat of a metallic is it has to be uniform when sprayed. Much more difficult than a solid color in that regard.
And since I drive my cars, chips and dings can be touched up on a solid and blended much better than a metallic.
I can touch up metallic chip but I've aways been able to see the difference in the chip.
Even though adding harder to it is a PITA, I can touch up single stage enamels and urethanes . But I don't know how that would work on a base clear coat paint.
Sometimes it's best to just paint the whole fender, door, hood, decklid or roof/quarters as a unit instead for damage.