i have a powerfull gas soldering iron/blowtorch im sure its like a few thousand degrees with an accurate flame, could do the trick?
however really its a choice: wd40 or flame, NOT BOTH! kabooom.
im going to crawl under tomorrow i think and take a look what tools i'll need, i just moved house leaving my old toolset and so must buy a whole new set have to know exactly what i need before i start.