a few years ago i tried Meds Renu from Amazon.
love it.
the only thing i never got the chance to try is letting it cure and then putting Opti-Lens on top, but that's something completely unrelated to this thread lol. just something i was always curious about.
here are my pics from back then -
before:
after:
pre-final buff and with flash
after final dry buff and outside for 15 minutes (ignore the water along the edges/corners of the windshield)
that car saw minimal care and was outside for 24/7 365 year after year. overall it needed two applications and that held up for almost a year. the car had MANY paint issues re: failing clear and paint popping off the car from the primer and when the dealership body shop had the car one of the times they repaired it, they did something that make the plastic dry out so i just left it until she sold it at 145k miles.
i have used it on Civic cowling and rain gutters, Mini flares, Wrangler flares and Tacoma flares/rear window surrounds. i don't think they stress enough about prep in their instructions so i clean the trim really well, wipe down with IPA solution, mask the paint, etc.