I saw a display car at Daytona a few years ago where many of the chassis components were done with a similar product to HPC coating. They did the front suspension, rear suspension, driveshaft, etc., and it really looked good. If their product is as durable as HPC brand it would hold up well, my Limefire headers were done 15 years ago or so, and are still rust free.

The one at Daytona was sort of the metalizing process you guys have mentioned, and was stainless steel based, I think. Maybe just another option.

Don