I got this suggestion from a member and really liked the results on my 70 Challenger with black dash. All done with aerosol cans. Prime with SEM Black self-etch primer. Follow that with a very light dusting/fogging with Rustoleum Textured Black (sprayed from about 12-16 inches away). Final step is a couple of coats of SEM Trim Black. I only did the textured treatment on the section of the dash that’s visible once assembled. SEM paint is really nice.