Re: dash plates
What I did was to apply the reverse labels printed in clear, then I painted the entire back of the panel, this left the white lettering to show through which was back painted in black. It worked great. I've also done similar panels using just normal vinyl lettering cut as a stencil, then paint on the lettering, remove the vinyl stencil and paint the whole back in black or what ever darker color you wish. You can use any lighter color for lettering, silver, white, yellow, gold, etc.
I did another using smoke colored lexan, what I did on that one was to mask and etch the surface with the lettering, then I glass beaded the letters into the lexan, then filled the recessed letters with paint, and painted the back of the lexan to make it opaque.