'68 GTS Trunk Panel/Grille Factory Color

I'm having my trunk finish panel and grille professionally redone and the person doing the work wants to know if he should leave the nice argent color that resulted from anodizing or lightly paint each panel's accents in silver. He is matching it to pictures of GTS grilles/finish panels that I found online but can't tell whether the factory color was sprayed on or not. Which is it?