Just thought I would post some pictures of my old tach housing repainted, I first stripped the tach down. I then sanded it to bare metal and sprayed it with metal etch primer, let it dry(about 15 min.) then I sprayed it with dupont satin black bumper paint. The first picture compares it to a nos speedometer( which has never been installed on a bike) on the left. The second picture is of the paints I used.