I'm having problems with cracks in my finishes on my last two mandolins. I used the Mohawk branded Behlen instrument lacquer from my local Woodcrafters. On the first mando the cracks were around the F holes and really didn't show up until buffing the finish. I figured I didn't seal the F holes well enough and moisture from wet sanding got under the finish. On the current mando the crack is in the middle of the top. It's been sitting undisturbed for a couple weeks. I don't know what I could have done to precipitate this.
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