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Pre-wetting the boat before laying on the cloth can be tricky. I would only do it for difficult to wet-out cloth, such as Kevlar. With low viscosity resin you should be able to wet out through the two layers, but you do risk some very small bubbles between the layers.
I would lay out the first layer dry and apply epoxy through it. Then apply the next layer while the epoxy is still wet. The wet epoxy on glass is pretty slippery, so you have the opportunity to align the second layer. With the epoxy still wet, you have the ability to remove any excess resin when you are done.
> Does anyone have any tips on ensuring that enough epoxy gets down to the
> wood when I try to wet out 2 layers of glass with no fill-coat? I will be
> using thin epoxy (Raka) -- am I worrying about nothing?
> Apparenly George Roberts applies his epoxy directly to the wood, then
> rolls the cloth on, which has been rolled up on 2 pieces of PVC pipe like
> a Torah (scroll.) Unfortunately, I am a one-man operation. I did a dry-run
> of this method rolling from one end, but seemed to have a tendency to run
> off the side since I left only 2" of extra cloth on either side.
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Guillemot Kayak - High Performance Wooden Sea Kayak Designs