70/71 Dart Grill Paint

for you guys that have done this, I am going to be painting the grill on my 71 Dart in the near future (well at least near enough that I am thinking about it!). My questions are these . . . .
1. is it easier to paint the black first and then mask and paint the argent, or vice versa?
2. did you use an adhesion promoter under the paint?
3. who makes a good paint to re-do the argent? is it rattle can or spray gun application?

Thanks in advance! L8r

Jim