Deck Overhaul { Need Help}

[Blu_Lunch]

I had a couple of soft spots on the V-17 deck I was going to wait till next year to fix it. While sanding the bottom to paint I found where the boat was sitting on a bad roller had damaged the keel about 2 inches worth{ it worn thru several layers of glass and it was forming a drip of water on it overnight there was 2 drips. Seeing that I decided to redo the deck and at the same time add several layers of glass from the inside to the area and Marine-Tex and re contour the damaged area. I took out the 5 1/4 finish circular saw and left about 3 inch lip all around. It did not go through completely in spots. Should I recut the entire deck through or peel the top layer and remove the little squares that made the deck. What's the correct way to remove the floor? I hope skools can guide me through this...............