SEM paint question

Finishing up the SEM paint on my 73 Sport interior plastic trim. Turning out great, going from parchment to black. My question before I try and maybe mess it up. The headliner trim above the door is metal. Can I use the same SEM color coat paint on these pieces? Or do I need to find a standard paint that matches the SEM color? And if I use the SEM color coat, do I still need the adhesion promoter? Thanks FABO.