The sole sideview mirror on the bus also functions as the hinge pin for the door. The passenger side did not have a mirror at all, so there was a traditional hinge pan. After making several attempts to free both hinge pins using a combination of penetrant and heat and “persuasion”, neither one budged at all. I finally resigned to take it over to someone with better heat and better persuasion tools. The shop had them both out in about 2 hours.