Sheldon Brown site seams to cover it very well with maybe the addition of cooling the alloy post. Not only does it expand at twice that of steal but it shrinks at that same amount. It worked once for me.
>From: Sheldon Brown <CaptBike@sheldonbrown.com>
>Date: 2007/02/07 Wed PM 01:06:39 CST
>To: AVERYALLEN@aol.com, classicrendezvous@bikelist.org
>Subject: Re: [CR]Latest Thinking Concerning Stuck Seatpost Removal
>David Allen queried:
>>
>>What's the latest on stuck seatpost removal?
>
>See: http://sheldonbrown.com/
>
>Sheldon "NH3" Brown
>+-------------------------------------------------------+
>| Military conscription is the worst form of slavery. |
>| A more enlightened age will consider it a War Crime. |
>+-------------------------------------------------------+
>--
> Harris Cyclery, West Newton, Massachusetts
> Phone 617-244-9772 FAX 617-244-1041
> http://harriscyclery.com
> Hard-to-find parts shipped Worldwide
> http://captainbike.com
> Useful articles about bicycles and cycling
> http://sheldonbrown.com
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>_______________________________________________
Stevn Willis
The Bike Stand
1778 East 2nd Street
Scotch Plains NJ 07076
thebikestand.com
908-322-330