It beggars belief sometimes, I know time is precious but if he knew what the job was and all it entailed then I am afraid you have to start the disciplinary proceedings route, Mostly and most unfortunately this is usually a one way street , is there no older skilled man who can tell him the error of his ways ???
I too have a similar problem with customer driven job requests which entail asking people having to work premium hours, we pay �20 per hour for these jobs, some don't want it , some occasionaly do and some will do it everytime, I always ask the willing horses first and never usually have to go to the next line of may do's....