I'm building my wife a guitar in the style of the Gibson J185. I thinned the first soundboard too thin and am considering a second set of redwood that I have. But these spots. Could it be salt? Any other ideas? Not sure how "thick" these spots are, but they're present on both sides.

[IMG]Untitled by Gary Davis, on Flickr[/IMG]

I appreciate any help you can offer.

Gary Davis