Seatpost is OUT !!
No drastic action required. Frame was upside-down for a few weeks with Kroil sprayed down the seattube.
Today, I put the top of the seatpost in the bench vise, grabbed the head tube and rear dropout & twisted. It took moderate force, but nothing crazy and the bond "cracked".
Then it was just a matter of twisting & pulling for 5 minutes. The deepest part of the seatpost was dry, so not sure the kroil did any good, since it didn't seem to have penetrated the bond.
Last edited by Homebrew01; 03-01-20 at 12:04 PM.