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  1. Hi all- Im one of those newbies who is finally abile to comment on an issue and hopefully help. I happen to be a bit of a bike fiend and have had issues like this. A old Colnago (steel frame) of mine decided it didnt want to give up a (alluminum seat) post. I tried everything incuding taking it into the shop and the mechanics there couldnt get it either. They actually wanted to cut it out piece by piece, which is a bit scary to do to an old Colnago. So enough of my rambling, what I ended up doing is applied some ammonia. Yes mr. clean will knock the oxidation out of a steel/alluminum bond and fairly fast (like minutes top) I hope this helps Jeff

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