Have to say - I know this is a ford site - but anyway - few years ago now but - I knew - hes gone now- one of the main service techs at a local major ford dealership... and he told me that they used to clean up the outside - visible bit -of rocker gaskets and other gaskets and charge for a new one being replaced.... just shows you ...and thats fact. proper.

also at the same dealership - when they used to do overnight works - I used to run a small courier company so needed the work done when the vehicles were not earning - so overnight if poss - i used to book it in to be done - collect next morn to find nothing done - so me into service reception and they had the job card there and try to tell me the work was carried out !!!???? and invoice me ffs