Alright, whats the best way to prep the plastic area of the grill for primer/paint? Prep like metal? Thanks!

Is it possible to determine if the upper and lower grill moldings have been painted red on my 67. It's a standard grill even though the emblems says RS. Or is it some molding that should be attached on top of the red metal? I have the headlamp bezels and they fits well with the red plate/molding...

I have done a site search for paint codes and I think I found the interior paint codes for the dash. I have a black interior and the 1968 chevrolet interior color page I found says it is Ditzler 9266. Questions: Interior Is low gloss 30%? It is used for the face of the dash right? The manual...