The engine grill on my 73 S has either faded or baked away. It appears to have been originally black, but now much of it has faded or been baked away to a sort of silver gray. How do I restore the color? Was it originally painted black? Was it anodized? Was it powdercoated? The same is true of the "2.4" litre badging on the grill. The rough portion between the "2.4" numbers should be black but is now faded to silver. How do I restore these parts?

Thanks,

SS