Many car owners encounter the situation that the repaired paint layer appears with blisters, peeling off into patches after a period of use, and may even peel off when washing the car.
According to a car repair technician at Ninety Eight Auto (Cat Lai ward, Ho Chi Minh City), the quality of the paint layer depends not only on the type of paint but also heavily on the surface treatment process before painting.
The reason for the degradation of the paint may stem from improperly treated the base layer from the beginning.
If the surface has not been cleaned, properly treated, or the sub-material layers have poor adhesion, the bond between the layers may degrade after a period of use, leading to blisters or peeling.
For plastic parts, technicians say it is necessary to use a lining material or adhesion enhancer suitable for the type of plastic and paint system. If you ignore or use the wrong material, the adhesion between the plastic surface and the next layers may be affected, thereby increasing the risk of peeling during use.
For metal parts, when the repair process exposes the metal surface, this area needs to be cleaned, treated, and suitable lining material used according to the paint system before continuing the repair and coating stages.
Just rubbing rough, applying powder and then coating without properly treating the base can affect the durability of the paint layer.
Another problem is using too much frosting powder or constructing incorrectly. When frosting powder is used too thick or the base underneath is unstable, the material layer may shrink, crack or become unstable over time.
Initially, the surface can still be flat and beautiful, but after a while, imperfections in the base layer may reappear in the form of blisters or abnormalities on the paint surface.
When the base layer has bulged or lost its bond, water and impacts during car washing can cause this material to continue to peel off.
In this case, just repainting the outside usually does not treat the cause. The damaged material part needs to be removed, the surface is re-treated to a stable base layer before performing the next painting steps.
According to technicians, the time of appearance of peeling may be different, depending on the quality of repair, materials used and operating and maintenance conditions of the vehicle. Therefore, vehicle owners should not only evaluate service quality based on the appearance of the vehicle immediately after completing repair.
Repair costs are also a factor to consider. When choosing a garage, car owners should clearly understand the scope of work, the type of materials used, surface treatment stages and warranty policies. A low price does not mean poor quality, but cutting materials or stages to reduce costs may affect the durability of the paint layer.
Before handing over the car, the car owner should specifically discuss with the garage about the repair process, materials used and warranty period. A clear warranty policy for errors such as peeling paint also helps users have more basis for evaluating service quality.
