FYI here's the link to the PB Blaster. http://blasterchemical.com/display.cfm?p=50003&pid=4

That stuff rocks. Not just for un-sticking things. You have a rusty chain? Put it in a pie plate and spray the stuff on. Let it sit for a while. The rust will melt away. Don't get it on your clothes and it's smelly, think gasoline type smelly.