neighbors bottom bracket overhaul on his really dirty old D/S schwinn mtb. first the stupid crainring crank corroded itself to the shaft breaking the threads on the crank then 45 minutes hitting it with a torch, a swift blow from a 4lb improvised crank removing device i was able to spend the rest of the day removing the caked on grime to get at the bottom bracket notches it was easy there once i switched from breaker bar to impact gun. the shaft was chewed up since it was ridden basically with no bearings i jb welded the ruts smoothed it, greased it, and put everything back together and gave it back to the owner.
i made 20$ on that job
