Interesting gonna try it this weekend.
http://www.liveleak.com/view?i=ba2_1475277076
This video has been floating around Facebook all day too......it's an old hot rodder's trick, I've been using it for decades to get rusted exhaust nuts off......and it DOES work!
That's a pretty cool tip! Thanks for posting it - 77.gif
Seems too simple.
But of course, many of the best things in the world are simple.