When I wedge the post in the storm drain on the road and twist the frame (don't have a vice) it now turns.
I really thought that when 'I broke the seal' I would be on the home straight, but I still can't remove the post from the frame-set. Tried belting it upwards with a heavy hammer using the clamp area. I'm getting a solid contact but it just won't budge.
A vice and a heavy bench will really help. You need to encourage the frame away from the seatpost, rather than just twisting. Seatpost in vice, shoulder inside the frame, twist and stand up
I really thought I'd beaten this seatpost.
When I wedge the post in the storm drain on the road and twist the frame (don't have a vice) it now turns.
I really thought that when 'I broke the seal' I would be on the home straight, but I still can't remove the post from the frame-set. Tried belting it upwards with a heavy hammer using the clamp area. I'm getting a solid contact but it just won't budge.
@lynx it's a steel frameset, alloy post.