What paint for bumper, grille, door panels?

[HunterRotten]

I'm planning on painting my rear step bumper here soon the original argent color. Does anyone here have any recommendations on rattlecan paint? I see east wood sells the argent silver color but it's like $13 a can + shipping..

I am also planning on repairing the one broken piece in my 1978(77-80) GMC grille. I am not sure what colors I need to restore my grille. I think I like the two shades of gray color with the tangerine/orange color for the actual GMC logo. Again, I'm looking for rattlecan recommendations. I'm going to add a photo to this thread to show which grille I have.

Next is the door panels. I recently picked up a set of 81-87 door panels with manual windows. I prefer these door panels to the earlier ones so I'm looking to use these. What type of dye/vinyl paint do I need? I'm looking to be the Medium/Hawaiian blue color. SEM??