try stripping the BB and soaking in GT85 overnight or longer before giving it another go. It's designed to penetrate. if you really can't get it out just use a shorter spindle.
Edit: I mean soak the BB shell, I normally would have plastic down and spray loads on with the frame lying down and repeat every 6 to 12 hours or so then try and loosen before you turn it over and repeat. I'd also start with stick end down first.
try stripping the BB and soaking in GT85 overnight or longer before giving it another go. It's designed to penetrate. if you really can't get it out just use a shorter spindle.
Edit: I mean soak the BB shell, I normally would have plastic down and spray loads on with the frame lying down and repeat every 6 to 12 hours or so then try and loosen before you turn it over and repeat. I'd also start with stick end down first.