The numbers also reflect total depth and not just clear coat depth. Clear coat depth likely amounts for 1.3-1.9 mils of that total thickness. I have an ultrasonic depth gauge, DeFelsko Positector 200 Advanced that will accurately tell me depths of up to three separate layers, even on composite panels. Really neat tool to use and educate yourself with while polishing, but most other detailers don't bother the expense and would rather take a chance with your car. They may be experienced, but the difference between 0.25-0.50 mils is gigantic and could be the difference of perfection or devastation and you have no way of knowing before-hand without this gauge. With the gauges (I have two) I know well before starting any polishing... I liken it to any O.R. surgeon working with the lights on or the lights off while operating :lol
The depth report for a new car is just simply a neat part of knowing that much more about your vehicle. The ranges are completely normal and are like that on all vehicles... regardless of the coating processes, there is no single vehicle that would be at 4.0 or 5.0 mils accurately and completely across every panel, body contour, or surface such as aluminum compared to plastic. Variations are normal, but working with the changing variations in mind are important to ensure the polishing being performed is at the best interest of the paint's longevity and life performance. Polishing too aggressive with too much heat generated can lead to immediate and obvious problems (Burn) or distant problems with premature oxidation of the finish that will require more upkeep and eventually wear faster due to that larger initial removal of overall depth caused by aggressive polishing. The report plays a more important role on any older vehicle or any pre-owned vehicle that you may be purchasing, especially one of significant value. I just thought I would include it as the owner requested it and it was kind of interesting to note the values.
