Already for the bottom layer of glass. This additional layer should increase the glass layers to 6-7 and should make it super strong as well as helping with the structural strength of the cabin.
Once cured taken outside and trimmed and sanded, covered holes re-drilled and all the underside tidied up. Now I'm not sure if you are supposed to do this but once the clean up was done I did a covering of epoxy resin to smooth and seal everything up.
Final shot of the under side. Pretty darn happy with the result since this is my first time fiber-glassing on this scale. Now I'm thinking of all the other "things" that need glassing.