Elan enthusiasts - I had my 4-2-1 headers coated by Jet Hot before assembly for the same reasons everyone else did. Headers had light rust, which JetHot said they would remove. My headers looked great for a year. Now - 2 years later- they are all pitted and look like crap. Although I now live in Switzerland (sans Elan)I lived in Cincinnati at the time and we have humid winters and summers for that matter. Temperatures are hard for me to judge. Never got that hot though. I would NOT use Jet Hot again.
65 S2 (in storage till I return)