Every so often, I see you pros pictures that show you removing wheels to clean the barrels, or removing badges to polish the area evenly. Do you ask your customers first? And how do you do it?
I always ask before removing wheels, badges, seats, etc... Also, if I am removing wheels, I always make sure to retorque the wheels in front of my client, so that there is no question that the wheels are properly tightened. It gives me and the customer peice of mind when he/she drives off.
Before altering a vehicle (even temporarily), I would get written consent and a liability sign off. This is pretty standard practice in every other sector of automotive service. When it comes to removing wheels, definitely make sure you carry insurance--even if you torque the lug nuts in front of them.