With the development of society and economy, cars have become people’s daily means of transportation. Basically, every household has a car. Some people like to buy a new car, and some people will choose to buy a used car. 

The market is also becoming more and more popular, but used cars are non-standard products, one car in one condition, one price, due to different car conditions, even the same type of car in the same year will have a small floating price difference. 

How to evaluate the condition and price of a used car must be judged by the appraiser based on the condition of the used car. From the perspective of the used car inspection, the appearance inspection is relatively basic.

Guoou paint thickness gauge is a special equipment for detecting the thickness of paint on the surface of metal substrates. Since the covering surface of the car is basically painted with paint, the thickness of the paint surface can be directly judged by the paint film meter to determine the sheet metal and painting conditions of a car, and it can also indirectly judge the size of the vehicle accident damage. The working principle of the Toru Paint Film Apparatus is very simple. According to different cars, there are iron body, aluminum body, etc. According to the body of different metal substrates, it will automatically use the corresponding measurement principle to measure, and the measured number is the body paint. For thickness, the unit um of the paint thickness gauge is microns, which is quite a small unit, generally one or two microns is invisible to the naked eye. The guoou paint thickness gauge  has many functions.  All of our model are with Bluetooth function that can  transmit data synchronously.

It can be known from experience that the thickness of the original paint of a common car is between 100-180 microns. Generally, the paint thickness of Japanese cars is thinner, while German cars and American cars are slightly thicker, and some imported cars have higher paint thickness. Because of different brands, models, and models, the paint process of a car may change with the improvement of production technology. Generally, the paint thickness of a car body cover is basically the same. If the paint of a certain exterior part The thickness of the surface is higher than that of the original paint, which may be caused by the second paint. Generally, the thickness of the second paint is much thicker than the original car paint. For example, when measuring the car roof, the paint thickness of the front cover of the car is about 140um. , Measure the thickness of the car paint at the position next to the door to 200um, then this position is the car paint repaired, sprayed paint, and then measure the thickness of the side to judge the range of the car paint repair through experience, if it is a small range, this kind of small Scratching will not have any effect on the car, and there is no need to be too entangled in the painting situation when buying a second-hand car.

If the paint surface thickness of the original car is much higher than that of the original car, it should be caused by the sheet metal repair. If the car body is dented or deformed after the collision of the vehicle, if it is dented, it needs to be repaired by sheet metal. The paint surface thickness of the original car is quite different. It is very likely that putty underneath will make the thickness measured by the paint film meter so thick; for example: the original car paint is 145um, and the measured 600-1000um is the case. The data obtained by using the paint film meter can be used for reference and estimation.

There is another situation like this. What happens when the paint thickness measured by the paint thickness gauge is smaller than that of the original car. In this case, the exterior parts are usually replaced. The production process of the sub-factory parts is different from that of the original parts. The sub-factory parts lack a layer of electrophoretic primer, so the detection value is lower than that of the original parts.

In the industry of used car appraisers, the data measured by the paint thickness gauge is only used as auxiliary data for vehicle evaluation, and the appearance inspection can not only rely on the measurement of the paint film meter, but also needs to be judged based on the appraiser's own experience.