This is what you use not some bic lighter or a toy electric solder gun,heat it up with your torch and then hold it on the screw head and a couple of applications and the heat will transfer and the locktite will give up. Its not rocket science.Don't reinvent the wheel.
http://www.rubylane.com/item/632271-002565/Large-Hand-Forged-Soldering-Iron
R
http://www.rubylane.com/item/632271-002565/Large-Hand-Forged-Soldering-Iron
R