The Fletchers did have metal decks, not wood. Also, once camouflaged the battleship's wooden decks were painted over.
Here's a link to a photo of a Cleveland class light cruiser and you can see how the camo continues over the horizontal surfaces:
http://mysite.verizon.net/resttsdu/s...1_LC_1280x.jpg
What you've done so far looks great. Can't wait for the release.