Apart from the colours Enzo, that's pretty much exactly what I'm doing to the Aston! Yellow stripe up the bonnet, around the grille aperture and down the bootlid and rear. Flags, race number, closer the the time get a 'Le Mans 24' sticker from Hollographics
http://www.hollographics.com/lemans/index.html they now have the official stickers for the race, designs released very soon!
I know you're just mocking up, but I would make it all a little thinner, that's all. The Scuderia/16M style, or maybe twin stripes, moving up either side of the bonnet badge, over the roof and down the bootlid and rear end? But the Italian flag works for the car, and works for YOU