You should try using aluminum powder for this plane, in person she is highly polished and looks damn good like that! I've just about finished the same mustang kit with the aluminum powder and she is shiny! She reflects light like the real thing, it's really cool to see a model airplane have the sun dance across it just like the real bird!
Here's a link to the FSM forum where I found about this, it's abit of reading but worth it. It will tell ya several ways of doing this, I prefer gloss white enamel with the powder rubbed into it and buffed to a shine! But it's really worth a look, here's the link
http://cs.finescale.com/forums/928189/ShowPost.aspxLet me know what you think.