First of all rub it down on the inside matt face with some mega gritty paper then wipe with acetone to "kill" the wax in the resin. Then sit the nosecone with the edges you want to extend onto a piece of shiney stuff like melamine...if you haven't got a gel coat I advise you use some plasticine to plug the gap so the resin can't run underneath then just glass it up.....leave it over night and fanny's yer aunt and all that


Oh and take the new glass layer up the inside face an inch or so to give it some strength, don't just add to the edge or it will snap off