Prepped foam and applied 2 x UND over turtleback, overlapping the fuselage over the longerons and firewall. This took 1kg of resin, and the resin cupboard is bare... Had another bash at spreading the resin with a little 4" roller. Worked well this time, saving a shed-load of time. Needed to cut the glass over the windows to get it to lay down in the flanges.