eliminate files marked as private

System

Sometimes jobs will create private files and attach them to tasks. I would like to have an ExternalTask at the end of each job that deletes these files. My question is, should it be called "PrivateRemover" or "PrivateDetacher"? I prefer PrivateDetacher but PrivateRemover is probably more accurate.

But seriously, is there any way to ensure the private files associated with a job get deleted (so they don't clutter up the workarea) even if the job is cancelled with iwrmjob or through the UI? I guess I could use a trigger, but by the time it fires will the information about what files were associated with the job be available, or will the job XML have already disappeared?