This is probably the best stuff on the market.
https://www.semproducts.com/product/classic-coattm#product-details
Use a grey scuff pad and some kitchen cleanser. To prep the surface, wipe it all down good with clean water and you want to repeat this until water doesn’t bead on the panel. Then wipe it down with the SEM plastic prep.
https://www.semproducts.com/product/plastic-leather-prep#product-details
Then follow up with 2-3 coats of the color, no need to clear over this, it will dry to a nice semi gloss, egg shell factory sheen. Big thing is let is sit 36-48 hours above 70 degrees before playing with it or installing ant trim.