Just sharing here what I found on another forum. Simple retrofit from a poor halogen to a sharp HID night set-up. No black paint!
Esthetically I think the results are equally great. The owner of this P car left the inside of the headlight factory-color, install projectors and tinted the amber flashers with 3M's 35% window paper. Simple but very nice.

^ Sharp beam, clean, stylish, what else... forgot