[Mike 85]

Sand your bare metal with 80gt,clean with grease & wax remover,spray 2 coats of Southern Polyurethanes,(SPI), Black EPOXY primer with a 1.4 tip gun and drive it.
You may decide to leave it with this as it's a killer flat black BUT,
It will chalk on you over time BUT,
THIS does NOT degrade IT'S effectivness.
You can resand with 180,clean and either do bodywork and reprime with the White epoxy and block it out or just reprime with White,sand with 4-600 and shoot your Orange.You cut thru to bare and just respot the epoxy.
Epoxy is the ONLY primer you can shoot and drive with and expect NO rust or contamination with.Not all epoxies are created equal and some end up being like concrete after a month but SPI's epoxy is just WAY beyond most ANY on the market.