Works great on bare metal if you want a smooth look

Maybe this Dupli-color is for some other plastic that has a smooth shiny look and you want to paint over it without sanding.

A great look and thus far no issues with anything I’ve painted

Turned aut really well and the grille looks like new.

Before Spraying a 2K clear I sprayed my sanded headlights with this adhesion promoter and it crackled when I sprayed it, sprayed it again and same thing.