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1、 Reason: The air trapped under the paint film expands, causing the paint film to separate from the substrate.

a. Improper application methods for atomic ash, eye filling ash, or primer, resulting in air trapping in the paint film.

b. Improper treatment of feather edges at the junction of the paint film.

c. The paint film covers the gaps or dead corners, creating gaps underneath the paint film.

d. The use of poor quality diluents or inadequate diluents, high compressed air pressure, or dry spraying can create pores or bubbles inside the primer.

e. Failure to properly handle and close the substrate, especially when spraying the exterior of fiberglass.

f. The temperature is too high when drying the paint film.

2、 Prevention:

a. Properly apply atomic ash, eye filler, or primer.

b. Properly make feather edges.

c. Avoid spraying paint too thick at once, ensuring that the paint penetrates into gaps and dead corners.

d. Be sure to use the recommended thinner and operate according to the correct spraying process. The primer should be sprayed thin and wet.

e. Check if there are any air holes on the substrate, and pay special attention to the bubbles inside the outer adhesive layer of the fiberglass. Carefully remove bubbles and close the substrate.

f. When baking the paint film, avoid excessive temperature.

3、 Repair:

Grind off all the corresponding paint film according to the depth of the bubbles, repair the defects in the base layer, and then spray the paint again.

Article source: Qingyuan Automotive Repair Paint http://www.jinliangxincai.com