After a long period where it seemed that all I did was make holes in my fibreglass cabin cruiser, "Twiggy", I have at least started to repair them. This time I use sheets of "1708" fibreglass mat soaked in vinylester resin followed by dollops of the same resin mixed with chopped up fibreglass strands, to give a contour to the corner (this will all be sanded and gone over again with more 1708 later)