Is the white showing through a black car the primer?

2 Answers
VonMadeline
07/29/25 8:12am
Normally, if white is showing through a black car, it is the primer. Correspondingly, if black is showing through a white car, it is also the primer. It is recommended to check the vehicle's user manual, which will provide relevant information. Bumper primer: The primer for front and rear bumpers, if made of plastic, is black; if not made of plastic, there is no primer. Body and door primer: As for the body and doors, basically any color that differs from the body color is the primer. Related knowledge about car paint: The primer for plastic bumpers is different from that of the car body, as the body uses electrophoresis. Waxing can only increase the smoothness of the paint surface and provides minimal protection to the paint film, but it cannot achieve the effect of repainting.
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DelJesse
08/12/25 11:24am
Yes, when a black car shows white spots, it's likely that the primer is exposed. As someone who enjoys tinkering with cars, I often encounter this issue. Typically, a car's paint consists of three layers: the bottom layer is the primer, usually white or gray, primarily for rust prevention; the middle layer is the base coat, which gives the car its black color; and the top layer is the clear coat, which provides protection. When the top layers wear off or get scratched, the primer becomes visible, appearing as white spots or streaks. Common causes include road debris impacts, scratches from tree branches, or damage from using hard brushes during car washes. If left untreated, rainwater can seep in and cause rust, leading to costly repairs later. I recommend first assessing the extent of the damage: if it's minor, use a touch-up pen for temporary coverage; if the area is large, it's best to seek professional repainting. Regularly washing your car with soft water and applying wax can help reduce such wear. Remember, light scratches can sometimes be buffed out with polishing compound, but deep scratches are best left to professionals.
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