You really should fill the kerfs with thickened epoxy if you can. It will make the repair a good deal stronger.
As for wetting out the surface... you should wet the prepped deck inner laminate with unthickened epoxy and then put on a thin layer of thickened epoxy to help the balsa bed properly. The balsa should also be pre-wetted with unthickened epoxy to prevent it from stealing epoxy from the thickened epoxy bedding layer and causing it to not bond properly from insufficient epoxy.
Then the upper surface of the core material (assuming you're using the balsa) should be wet out with unthickened epoxy and then coated with a thin layer of thickened epoxy and then the top layers of glass laid down over that. I hope you left enough of the top laminate at the edge for you to have something to tab the repair to.
The major advantage of airex is that it does not rot.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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