Visitors are alerted to potential hazards

The best policy is not to let customers into the workshop – many garages have a notice to this effect on the workshop door. For MOT purposes garages must have a customer viewing area. However,it is not always possible to keep people out of the workshop. Insurance company assessors and RAC/AA engineers will probably also require entry to the workshop as well as some customers who are concerned about their vehicles. So,before allowing them into the workshop you should warn them of potential hazards. For instance the dangers of oil and grease and the requirement to wear a hard hat.
It is always a good idea to accompany customers when they are in the workshop,this way you can advise them in the event that they may do some- thing potentially dangerous or if there is a hazard of which they may not be readily aware.Car Repair Talk's forum.