Well since your a Reds fan
I used Krylon Fusion Paint They make a good semi gloss or flat. This can be bought at Walmart or Home depot.. This paint is made for plastics
The #1 issue is making sure the plastics are clean.. I recommend Dawn.. Has a great surfactant in it that loves oils..
I pulled all mine off.. washed them with Dawn and a good tire scrub brush.. TWICE! All those road oils need to be off..
Best way to start this is the rear bumper plastic.. The one on top of the bumper.. It pops off.. ZERO screws... Wash it,, Dry it, Make sure no water is on it.. then I sprayed a light coat of paint. You should see some paint on it.. But it shouldnt look done.. LIGHT coat.. Give it about 15 mins.. Then repeat the light coat again.. "TIP" Hold the can a good 6 to 10" away from the plastic or you will get runs..
After that coat drys you should see the color coming in.. Next is the final coat.. I go Med - heavy on the last coat.. Still I dont want runs.. Then let it dry over night... and your done..
This can be a fun project.. But you need to not rush and take your time..
Ill try to post some pictures for you later