Engine painting help and tips

[garner]

I hope this is the right section, I apologize if it's not

Gonna be painting some engine bay stuff but not sure how I should go about doing it. I'm gonna be doing the coil covers with VHT grabber green(?) engine paint, should I clear coat it? I'm in the middle cause they're kinda visible but kinda hidden

Then I'm gonna be doing the radiator cover and manifold plenum cover in black and clear coat, should I just clear over the black plastic or should I paint it black then clear?

And finally, the strut tower brace. My buddy thinks painting the whole brace in green will look good but I'm thinking just the plaque. Opinions?