I have been thinking about whether or not to add a layer of glass cloth to the deck. Pro - stronger, Con and bit heavier. In the end I decided to go for it, but followed some advice from the internet (laughing loon) to seal the wood first with a thin coat of epoxy. It was good advice, but as I was rolling it on, some darker stripes appeared on the deck. These were in the locations where I had used some straps to tie down the deck while I was nailing it into place. They had been completely invisible on the unfinished wood - I guess that something from the strap (water? oil?) ended up impregnated in the deck and showed up only in the presence of the uncured epoxy. There is nothing to be done and they will have to be 'regretted'. Before the epoxy had fully cured, I put on the layer of glass. I used a roller, rather than a squeegee, and I think was a good choice. I will trim out the cockpit piece before the epoxy cures fully.