For the bottom I've used 2 layers of 450g/m2 biax cloth. This is a seriously heavy layup and is roughly the equivalent to the weight of woven roving specified by Matt. These two layers managed to consume 6 litres of epoxy between them, which included a filler topcoat containing fumed silica, and a light fairing coat of microballons. All in all a big piece of work, but one which went without any major hitches. I'll need to spend some time tidying up and sanding fair, but once done, Johanna will be on her side for sheathing of the topsides. This probably won't happen now until the first week in July as I'll be off riding a sponsored cycle ride for a week in the last week in June.
Layer one of 450gm biax
First layer wetted out
Two layers on
Fairing top coat