Not to sure about the removing wax part, but the major concerns with any automated car wash is the use of recycled (dirty) water.
Some towns/counties have codes forcing them too.
Other than that the other gripe is them leaving a film (from the soap) on the car when done. Which you QD off.
Not all "Touchless" car washes are the same in as much as technology. U need to check a few out or work off a reccommendation.