Need your advice for painting grille/bezels

[Lost81c10]

Hope all is well with everyone.
I am ready to paint my grille on my 85 but wanted to ask a few questions before I pulled the trigger. Currently it is all cleaned, sanded with 600 and ready to spray but can’t decide whether to use Duplicolor rattle can or some two part paint which would also be in a rattle can, but with activator as the likes of Eastwood except from my local paint dealer who said they can match any color in a enamel/urethane/acrylic (I am thinking Urethane if o go this route)
Can I assume that one of the main factors of either choice (duplicator/two part) is cost or is it that the two part stuff does not work well for the grille?
What about durability from one compared to the other? How long would each one hold up for?
I keep trying to convince myself out of spending $60 on paint/primer by going w/ Duplicolor and if it does not last but for a few years (please tell me if I can expect longer) that it might be easier to redo (use some lacquer thinner/scuff and repaint not too much elbow grease) but maybe a two part will be that same…don’t know or maybe spending the $60 be worth the difference?
So what kind of paint were these originally painted with from factory? Was it enamel, acrylic, urethane…(for either one, would it have been in a two part?)
Now for my prep process (let me know if I need something else):
- Washed/cleaned
- Sanded w/ 600, is this enough?
- Can I use lacquer thinner/acetone to wipe it before paint?
- Is there something that I need to use on the plastic before primer/paint for better adhesion? And would it be different if using Duplicolor as it would be for two part paint?
- Would you recommend clear coat for durability or is it going to make it too shinny?

Thanks for all the help.