fiberglass hood, otherwise you dont know how the springs are reacting with the lighter hood. And no you need a real torch to get those springs hot enough. If we had a car at the shop needing a bolt on hood i would get a vid but we dont, sorry.
and as far as paint some is gonna cook off, thats why you do EVERYTHING before painting a car, put wet rags around it best you can and control where you put heat to minimize issues