There will be variances all around a vehicle, due to many reasons.
Some plants use a powdercoat surface primer, others apply a little more ecoat, some colors, like red base coats require additional mil build, other areas may have localized anti-chip primers applied. Like on edges of hoods, certain fender areas, etc
The plant may only give one pass of the clear applying atomizing bells to the sides and two to the horiztional surfaces.
And through it all, run a gauge over a panel, not lifting it, and watch the meter read in variances of a half a mil , more or less.
The key is the clear, and that is what must be a minimum on horizontals of 1.5 to 2 mil thick. The robots are not perfect, but much more precise than a human in applying the film build.
A plant in one area that builds a particular model may do that, use only one pass on the verticals side surfaces, but another plant building the same model 600 miles away may apply two coats to the verticals as well.
So, the" total" amount of film build has nothing to do with the important part, the clearcoat.
That is the point I have attempted to make many times, only the .5 mil of the clear is what all should be concerned with. Not total film build. Unless cutting the clear, then a set of mil readings should be taken in order to ascertain how much is being removed in the process. It is important to know what the start point is.
It is also important that the technican have training that included the ability to spot previous repairs, identify them and know the correct process to proceed with.
That is why our PrepExcellence Course is so far ahead of the "How to detail a car" schools around the world. At the PrepExcellence school, the first day is all about paint, what makes it, what it was, what it is now, what is coming. We do the same regarding interior parts, seats, wheels, etc.
It is quite involved, however, unfortunately so many "detailers" believe that since they can run buffer, get some gloss on a paint job, get some stains out and spray a fu-fu fragrance, grease up the tires, they have no need of professional training and the ability to accurately diagnois conditions.
They have no real knowledge of paint, some of the most important information regarding it and it's chemistry. such as.
It must be kept clean of acids and other enviormental contaminates, for if it damaged by them, there is little recourse other than refinish.
They don't know how to do this, they just hit it with a strong detergent or clay it and think the problem is corrected.
Ketch
