Originally Posted by OctaneGuy

All you have to do is tell the service advisor to write on the order: DO NOT WASH CAR

Then tape a couple of signs inside on the steering wheel and dash that say
"DO NOT WASH/NO LAVE" to cover both English and Spanish employees.

As far as Nissan paint goes...in general, Nissan paint is pretty soft and thus swirls pretty easily even just from wiping it down with poor quality or just contaminated towels.

Richard