heres the black mirror i was telling you about.
you can see your intake cleaned and ready to coat to compare the color.

Silver Base / Black Mirror / 95 % Clear

another thought do them in Black Wrinkle and set them up in the mill and mill down .050 or so to just clean up the high spots.
like the mopar black valve covers

Bondo

5093342-SDC10252.JPG (179 downloads)