I tried using the heat method to get my Maier hood into some semblance of shape. I put over 80lbs of weight on it, plus two big cabinet clamps and enough heat that you couldn't put your hand on it and left it for several days with zero affect. Not that it mattered, not only was the hood bowed in the middle, as are ALL Maier hoods, but it was so narrow you could see the fender bolts underneath. All the heat in the world won't fix that. I fixed it in about an hour by cutting the skin loose from the subframe, setting the shape how I wanted, then 'glassing it back together. To widen it, I just sanded through the gel coat, then laminated on strips of 'glass matte. The fit is now perfect and it cost about $50. I've seen body shops charge upwards of $1200 to fix fiberglass because like most people they make you think it's magic. It's not. If you can operate scissors and a mixing stick you can do it.