engine paint works great, sounds funny but you don't have to worry about melt and with enamel you don't need clear coat. But watch out with the silver it is very fragile, armor all will take the matalic luster clean off. But for a paint the look like metal the only thing better is Testors Model Masters and for that you need to know what your doing, It needs polished and needs special clear coat. I would have used it but for big sections like that it too much of a pain in the ass.
So go down to pep boys and get some engine paint, test it on something (not from your car) and see what you think.