I'm half serious here - not because of the glow, but for all the other properties of inconel: It's much stronger than steel, it doesn't get brittle to anywhere near the same degree as stainless (or titanium for that matter), and as a result, you can build them much thinner, and therefore much lighter. And not only that, it's very corrosion resistant. The only problem is, of course, price. It will cost perhaps double that of stainless, and it's not easy to work with. But as the header "layout" of the M3W is a simple one, it shouldn't be too difficult (I imagine).
Inconel on Wikipedia:
http://en.wikipedia.org/wiki/Inconel
