Give rusty screws a shot of WD40 and let soak for a while. Overnight if it's really bad. Clean the WD40 off the screw before starting to unscrew, then proceed a

Give rusty screws a shot of WD40 and let soak for a while. Overnight if it's really bad. Clean the WD40 off the screw before starting to unscrew, then proceed as required.