heat method is worth a shot, you could use blowtorch to get the seatpin really hot, then dip it into a bucket of cold water, if your careful, wrap the frame in a wet towel and heat just the seatpost you might get away without damaging paint.
@roadwarrior started
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heat method is worth a shot, you could use blowtorch to get the seatpin really hot, then dip it into a bucket of cold water, if your careful, wrap the frame in a wet towel and heat just the seatpost you might get away without damaging paint.