Restoring a grill? repairs and paint?

I see where people talk about light argent, med argent, dark argent...?
I do, too. Some talk about argent silver. Hello. The word argent is derived from argentum which is the Latin name for silver or Ar as in the periodic table of elements. The shade I used on the 72 grilles would be considered a light or pale argent.

That said, particular hues are difficult to replicate. I do not trust my eyes or memory to reproduce colors. I take a color sample with me, or have a sample mixed up to see if it matches. It is a PITA, but often it is the difference between painting once or multiple times.

Have a 69 Dart... would the color on the flat part of the grill be considered light or med?
Not really sure what you are talking about. Probably light, but not sure. The other thing is that I think the grilles on the 69 models are anodized aluminum. This is a completely different animal to re-finish than the plastic grilles of the 70 and later models. Even the headlight trim pieces on the 70-72 are plastic. For 73, the grille is plastic, the headlight trim is anodized aluminum.

Also- any tricks on painting side grill bezels (silver outlines)???? Thanks!
Generally having a properly prepped surface bared to a spray can/gun will hold paint. Just mask off the portion you don't want painted. I usually use one line of tape to separate what I want painted from what I don't want painted. Then I use another line of tape to fasten newspaper or plastic sheeting to shield the larger area. It's easier for me to do it that way than to have the tape mask the object and hold other coverings in place. It also allows me to adjust one without having a major re-do of the other.

This maybe more than you asked for. Sorry. Hope it helps, though.