will study the detail to understand the the ignition lock cylinder. For now I will run the car as ALL NEWLY Built so I am desperate to see it move, in particular as the Summer is currently nice in Germany. Will see how to protect it against theft for now..
And YES I used for "lubrication" graphite powder but correct WDW 40 is not good for cleaning due to residuals glueing, will use lacquer thinner as you mentioned when out.
Also as the plastic door handles are broken I will now remove the handles and locks, clean the locks as you explained, lub. with graphite and replace the plastic handle shell by Aluminum shells which I have already..(expensive but very nice!!).
Will come back on guidance for the ignition tumbler.
..and the trunk lock is there as well..