Block the bottom bracket openings and base of the head tube.
Block the bottle mounts and any other holes- bluetac should be fine.
Pour concentrated caustic soda into the frame until full.
Leave the frame in a warm and humid place for four days- the seatpost should be gone.
@Dammit started
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Block the bottom bracket openings and base of the head tube.
Block the bottle mounts and any other holes- bluetac should be fine.
Pour concentrated caustic soda into the frame until full.
Leave the frame in a warm and humid place for four days- the seatpost should be gone.