well considering the fact that 99% of new clients calls are wash or wax calls i pretty much give em a prcie between yada and yada, and explain there is much more they CAN do for thier vehicle, but not go into specs to avoid sounding trained by amazon.com. i examine the vehicle thouroughly before working on it, alot of times the client is working themselves so they dont really have time for a long explanation of what process is needed so this makes it difficult. in cases like these i simply do what they request and then leave a may we recomend list with the keys attached. for instance may we recomend clay detail to remove bonded comtaminants.
i normally just show up in work truck, as i sell most jobs on site not over the phone as most are completely unaware of what a full job really is. i have plenty of people tell me they can get a full detail at the local wash n wax for ninety dollars. i tell them its not what i consider a full detail. and explain they pay the car wash three times an hour what they pay me.
alot of times doing this will create thier curiosity, but it definitely helps to go over it in person. make sure to explain that wax doesnt correct paint damage. alot of people dont know that, one person we did a cherity event for asked if id wax the scratches out of her car. i stress the amount of time that it will take but also i am speak very confident on how it would look when finished. if i dont think i can do it those natural juices dont flow and i dont explain with as much enthusiasm im sure. only had a few stumpers lately but they were due to lack of troubleshooting time, i never leave a loose end.