I couldn't get the stock BB out of my '93 Bridgestone frame by myself. I figured I'd let my LBS have a go at it before I spent money on tools I may never need again and/or killed myself. They called today and said they spent an hour on it with an air hammer and a torch and no dice. They said the shell got to be red hot and the cups still didn't budge.
In their/my defense, this bike has been ridden in everything for the past 13 years and even basically lived outside for a year in the Northeast.
I've read about all the techniques -- bolts, penetrating solutions/oils, breaker bars, vices, torches, etc. -- but all I also read about on BF is success stories when it comes to BB removal.
So, with apologies for the negative waves, can bottom brackets always be removed?