I've got the whole unit down to individual parts and there is some light rust on the surface of the metal front face of the Gauge/Speedo cover that means now would be the time to sand/repaint it. My FJ40 is a 1976 and I would describe the color as a muted silver right now. I could just paint it some grey/silver color but if there is an official name and color I can buy I would use that unless its hard to get or very expensive..