Minimizing the Paint Defects

Painting, which provides a better visual aspect and protection of the relevant material, can be applied to surfaces with many different features. After the painting process, there may be particular defects on the processed surface. All of these defects are known as "paint defects". Frequent paint defects can be listed as follows;

Acid Effect

The acid effect can be observed in the form of discoloration, peeling, cracking and patterns on the painted surface. Acid effect in paint occurs as a result of improper chemical use, acid rain and spillage of abrasive substances on the surface. Especially after the automotive painting process, acid effect can be among the common paint defects.


The paint defect seen in colors such as red and burgundy appears when the paint changes color in a fluctuating manner. This situation occurs when the newly painted surface reveals the lower layer of paint. After this defect, the relevant surface is sanded and repainted.

Moisture Bubbles

Moisture bubbles appear as drops and dots on the outer surface of the paint. Sometimes they can also be seen as fingerprints or curves. This can occur both on the primer and the outer surface. The blistering on the outer surface is more visible. Moisture bubbles may occur due to insufficient primer during the painting process. Touching the newly painted surface can also cause this defect. You can remove this defect by sanding and repainting.


Haziness is a paint defect characterized by the white look of the top layer of the paint. The main cause of haziness is humidity in the paint layer. In addition, the use of poor quality thinner, improper adjustment of the spray gun if spraying and workshop conditions are among the reasons for this defect. Proper use of thinner, polishing process and correct sanding prevent the appearance of this defect.

Air Bubbles

This paint defect, which is seen at the attachment points of the painted surface, occurs as a result of incorrect painting process on plastic surfaces. Excessive primer and paste application can also be counted among the causes of air bubble defect. In order to prevent the formation of air bubble paint defect, filler primer and putty should be applied to the relevant surface with thin thicknesses. Air bubble defects require repainting.


Chalking, which is seen due to the aging of the painted spot, is evident by the appearance of white powder on the outer paint layer. This is seen as a result of poor quality painting process.

In addition, the deterioration of the color pigment depending on the paint quality may also cause this defect to occur. You can prevent this from happening by using a suitable paint hardener and preventing the painted surface from being exposed to too much ultraviolet light.

Silicone Opening

Silicone opening is one of the most common paint defects. It can be observed as perforations and pits on the exterior paint surface. Sometimes it can be seen as a single and large one, while sometimes it can be seen as small and numerous.

Substances such as soap, grease, wax and paint oil applied to the outer surface of the paint can cause this condition to occur. To prevent silicone opening, pay attention to the use of silicone-free varnish, the use of appropriate equipment and external surface cleaning.


Clouding, which can occur during the painting process due to incorrect spraying, refers to the simultaneous appearance of light and dark colors. The main cause of this issue is often incorrect painting. Additionally, if the surface to be painted is too cold or too hot, it can also lead to clouding. To prevent clouding and paint defects, it is important to clean the spray gun before application.


Corrosion, which is typically observed on the outer surface or edges of a painted object, can occur as a result of accidents or external factors. Corrosion can be seen as the complete peeling of a section of the painted surface. To prevent corrosion, the affected surface can be treated with a solvent or metal primer. If corrosion is observed as a paint defect, repainting may be necessary.


Cracks or separations, both large and small, on the outer surface of the paint are considered paint defects. Cracking can sometimes extend down to the primer. Causes of cracking include the use of low-quality paint, the presence of oil and air in the paint gun, and unsuitable surface conditions. Proper surface preparation, the use of high-quality paint, and equipment cleanliness can greatly reduce the occurrence of cracking.

Dry Spray Application

The appearance of tiny bubbles and roughness on the outer surface of the paint due to the use of dry powder paint is considered a paint defect. Causes of this issue include incorrect paint usage and the use of a paint gun with excessively high air pressure.


It is a paint defect characterized by the partial peeling of the outer surface of the paint, also known as "blistering." This peeling often starts at the edges and can progress towards the center.

The causes of this defect can include the addition of unsuitable substances to the surface, the incorrect use of metal primer, and the use of low-quality thinners.


This paint defect can cause the separation of the primer and the topcoat. The causes of this issue can include the application of synthetic paint that hardens with nitro or heat onto thermoplastic acrylics or air-drying synthetics, which can react with the underlying surface. To solve this problem, you can prevent the interaction between the primer and topcoat.

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