Hi Fritz
I will add in my two cents worth for your consideration.
As you can tell from my Gallery page I chose to go at the deck recore from the top and for me it turned out to be the right choice. One of the things I considered prior to starting was that I always intended to redo all of the non-skid on Destiny's deck because I wanted it all uniform and trying to match the existing pattern proved too costly and too difficut for me. So at that point there was no good reason to fight gravity and recore from the bottom.
I learned a lot along the way but the things I learned that apply to your situation are listed below.
First I learned that the top layer of glass on the deck was a lot thicker than I would have guessed before starting. And because of it, it was difficult to tell just how far the rot had gone throughout the deck. The only way I found reliable was to drill a series of 3/8" holes in the deck starting where I was confident I had rotten core and working out from there until I hit white balsa that was still good.
Second the rotted core was sopping wet. I could pick up a piec of it and squeeze it between my fingers and make water drip out of it. Once that water finds it way in it is very difficult for it to get back out. So trying to pump in epoxy through holes drilled in the deck would be in my mind a questionable way to fix the problem because I'm not sure how well it will bond to wet surfaces.
Third I looked at almost every method out there to redo the non-skid on Destiny and I settled on Kiwi Grip because I felt it provided the best looking finished product with the lowest cost of both time and money. And it can be applied over the existing non-skid and newly repaired patches and they will blend together. In addition you can get any color that can be mixed in paint. I talked to the comapny and they said you can have anyone that mixes paint color add the same colors to Kiwi Grip white and get whatever color you want.
Just some things for you to think about before you begin your project that I learned along the way. I hope it helps in some way.
JERRY CARPENTER - C147
A man can succeed at almost anything for which he has unlimited enthusiam.