Originally Posted by kevinsubaru
PB blast it (outside).
If that still doesn't work for some odd reason, remove the crank arm and soak the pedal area it in ammonia.
As I mentioned, things like "PB Blast" and "Liquid Wrench" don't seem to be available here. But I liberally applied WD40 and will attack it again, using a pipe extender in a few days.
I haven't heard of using ammonia -- does it act as a penetrating lubricant, or does it have a chemical effect?