Removing stuck or seized seatpost?

I've had a stuck seat post all of this week on a steel frame. I tried everything WD40 for days, then ammonia etc.

Today I took it to a friends workshop and he put the seatpost in a vice, slightly crushing it. It still wouldn't twist. Then we hammered each side of the post quite hard round in a circle for a while and tried twisting the bike again and kept doing this untill we got the slightest bit of movement. Obviously from then on it was just more hammering and twisting.

It was a complete bitch it get out all the way to the last point of the post! I could of never of got it done in my garden, so the moral of the story is find someone with a hench metal vice and selection of large hammers / mallets and ensure it's been soaked in as much penetrating lubricant before hand :)

I fully agree.
Vices & large hammers are the way forward.