Before you get the hacksaw out and begin cutting off seatposts, crank bolts, and other rusted, seized bike parts, give them a shot of Finish Line's Chill Zone and watch the magic.
Chill Zone is not a lubricating grease. It's a refrigerant that freezes metal to as low as negative 50 degrees Fahrenheit. This process causes the metal to contract and thereby creates micro-cracks in the corrosion and galvanically-fused metal parts. After it does this, a penetrating release agent is able to break down and remove the rust. Most seized parts regain full use.