Wet sanding. Detailers across the globe are enamored by the opportunity to level defects, orange peel, and scratches. Sanding allows for texture and defect removal with zero heat, unlike polishing which creates heat as a by product of friction. I use sanding techniques under two scenarios. The first is the reduction/removal of deep scratches. I prefer to start with a light sand on deep scratches so that I am not overheating a panel that can cause delimitation of the clear coat. The second use is on repainted hotrods. Several hotrod shops use Howard's Detailing to fully sand and polish their fresh paint jobs. You must use aggressive sanding techniques to remove trash and texture from the paint. Sanding on repainted hotrods is a different scenario than factory cars because they are given much more clear coat than factory paints. One reason is factories use less paint to save money, and the other reason is because hot rods are meant to be worked on so they have extra paint in case of an incident.
Whats the issue with sanding on a factory car? Think of Preservation. Don't detail it for how it will look this week, detail it for how it will look in 10 years.
The typical factory Mercedes/ Chevrolet/ Lexus paint is 2-4 mils thick which is as thin as a post-it note. The clear coat is even thinner than that. For me to lightly sand on a car, it must have AT LEAST 4 mils of total paint. Think of preservation. Imagine what a Ferrari F40 would look like today if a detailer tried to remove all the texture. It would most certainly had a repaint by now. Clear coat is essential to protecting the colored paint from heat and UV radiation. Wet sanding factory cars simply removes too much clear coat that can result in a quicker deterioration of your paint.
For potential clients, try to avoid having a detailer sand texture out of your factory paint. You're paying money to have years taken off of your paint.
For detailers, don't sand texture on factory cars with thin paint. Think of how you are affecting the car 10 years down the road.
Here is where I will go into detail about all things detailing (no pun intended).