i hate freaking hate fiberglass resin, it smells like ****,gets stuck to your hands and its itchy when you sand it not to mention its incredibly unhealthy. this is the safe but not as strong method(they do make a stronger product but it involves the use of scales and whatnot) i do resin casting for model cars and one day i figured hmm can i make a panel if i soaked cloth with it. so i did the baking soda was used to make the liquid into a paste . after it dried it was stiff with some flex and adhered to the cup(this stuff is occasionally used as glue). this opens a new door for those that are looking to get into fairings and wheel covers and skirted fenders
you can get the resin here
www.Smooth-on.com look up 305 or if you want the super strong stuff look for shellshock