I think it was painted from Factory Right ? because its painted on the Cowl
Not sure on Duster but 1973 Dart Sports that had V21 had a vinyl decals on hood but cowel was painted as the paint flows into to cowel vent slots.
Phoenix Graphics also said this when I asked since I ordered the hood vinyl.
Performance Car Graphics also said same thing painted cowel
I had a local graphic place match the shade and texture of the V21 Dart Sport graphics Phoenix sent me. It was installed after the hood was in place to duplicate it on the cowel.
The shop had quite a few blacks. So if you go that route instead of paint get whom ever you buy the graphics from to sell you some from the same batch that matches.
It took 2 of us and a heat gun. As each slot had to be cut centered. So a slit vinyl heated to bend it into each slot and stuck down. Something that would have really slowed the factory line down.
Sp the factory just used paint since it was fast just tape cowel shoot black and onto the next car.
All the original ones I have seen were painted cowel and vinyl hood at least on Dart Sports.
Original yes but looked bad being painted black cowel and vinyl decals on hood.
So I assume Dusters were done the same way. But you know what they say about Assume.