http://gizmodo.com/359531/hammerite-...-sides-at-once
http://www.hammerite.com/uk/products...ter_paint.html
I've been looking on the actual website, and can't find just what types of metal this would work with. It looks like everything they use it on is iron. But hey, I can be hopeful.
Edit: Works on most ferrous metals, and can be applied to aluminum as well with the application of a special primer.