That was me, and on this list. I got into a wee bit of trouble for letting that secret out to the public... 
It works better than anything I have ever tried. I'll never buy pb blaster or any of those things again.
Just as you said, just a bit of heat and a candle is all you need.
Didn't read the original post, but if it is a stuck exhaust stud as the subject line implies, then the ol candle trick has already proven itself in that arena - go for it.

-Ben

> Date: Sat, 16 Aug 2008 22:39:31 -0400
> From: streib@CS.INDIANA.EDU
> Subject: Re: Exhaust studs
> To: vanagon@GERRY.VANAGON.COM
> 
> Can't remember if it was this list or another, but someone suggested
> to free a frozen nut, heat it up with a torch and then touch a candle
> to the threads.  The wax will melt and be drawn into the threads by
> capillary action I guess.  I'm not sure why candle wax would work
> better than ordinary oil for this, though.
> 
> Allan
> --
> 1991 Vanagon GL

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