Experience with door locks?

[Plymouthcranbrook]

Either try spraying WD 40 or PB Blaster into the locks or use Lockease.? If they are just stuck it might free them especially if you let them sit for a day or two and soak.? Then reapply and gently try to turn the lock.? If that does not work you may need to have them repaired or replaced.

[48 Beauty]

The key fits into the cylinder but it does not turn and lock or unlock the door. The trunk key works fine. Either they gave me the wrong key or the cylinder is stuck. Maybe a locksmith can help. Sure would like to lock my 48 Plymouth. Any advice on this?