Jake,
I just restored my heater on my '58. I used Hammerite brand paint, black color, which matched almost perfectly the original color. Both the inside and outside of the metal housing were painted with this type of paint on my truck. The fan assembly itself appeared to be painted black. The screws are suposed to be natural metal from what I saw. Also I advise pulling the contole wires out of their spiral metal outer casings. I used 0000 steel wool on the wire and some Triflow on both the wire and inside the casing. Both operate very smoothly and will help avoid breaking off fragil heater control levers. Hope this helps

Greg, 1958 1/2 ton stepside canadian "patch"