I did my fender flares last year with some bumper coating which came out great but a little flat for my tastes but it has held up to some abuse and a full winter but needs more black and my valence came out like I wanted it. I will be adding the Tacoma rubber strips to my flares so if they come off again I'll repaint them with the Trim Paint. Will be painting my "bacony" plastic piece on top of the bumper today.

Here's the pics. The new paint does show existing scratches in the plastic but still better than before.
Before


Used this stiff after cleaning with prep spray and a couple coats of adhesion promoter.


And the results







Will look better once I get everything cleaned up and waxed.