You don't want to use "plastic" paint for a fiberglass canoe. That paint is made for polimer type plastic vs fiberglass ( big difference). Use an oil or acrylic based paint. Good old rustolium works great on fiberglass finish'es either directly on teh glass or over (sanded gel coat.) You can spray or use a 'roll and tip" method that works well. ( Research on the net.) I've done 5 canoes in this method and it works well.