Professional Repair Solutions for Large Scratches on PPF- Complete Guide to PPF Repair Technology

I. Judgment Standards and Damage Types of Large Scratches on PPF

• Coating-Damaged Large Scratches: Such scratches only damage the surface coating of the PPF, while the base material remains intact. They are characterized by loss of luster at the scratch, obvious white marks, and a slight uneven feeling when touched by hand. They are common in daily friction, minor scratches and other scenarios.
• Base Material-Damaged Large Scratches: The scratches are deep enough to penetrate the surface coating and damage the PPF base material, and may even cause tearing and damage to the base material. Such scratches are mostly caused by strong impacts such as high-speed stone impacts and malicious scratches with sharp objects. They not only affect the appearance but also lose the protective effect on the original paint.

II. Core of PPF Repair Technology: Professional Solutions for Large Scratches

(I) Coating-Damaged Large Scratches: Local Coating Repair Technology

1. Cleaning and Sanding: First, use professional cleaning agents to remove dust, oil stains and impurities on the surface of the scratch to ensure the repair area is clean and free of pollution. Then use ultra-fine sandpaper (usually above 2000 grit) to lightly sand the scratch area, smoothing the burrs at the edges of the scratch to lay the foundation for subsequent coating repair.
2. Application of Coating Repair Fluid: Select a professional repair fluid consistent with the coating material of the original PPF (such as TPU-specific repair coating), and evenly apply it to the sanded scratch area with a high-precision spray gun or special application tool. The choice of repair fluid is crucial. High-quality repair fluid needs to have yellowing resistance, UV resistance and scratch resistance comparable to the original coating.
3. Curing and Polishing: After application, according to the characteristics of the repair fluid, use UV curing or natural curing to fully dry and cure the repair fluid. After curing, use a professional polisher with ultra-fine polishing paste for polishing until the gloss and flatness of the repair area are completely consistent with the surrounding PPF, and no repair traces can be seen with the naked eye.

(II) Base Material-Damaged Large Scratches: Local Replacement + Seamless Splicing Technology

1. Damage Area Positioning and Cutting: First, accurately locate the scope of the base material damage. According to the damage size, cut the area to be replaced with professional tools without damaging the surrounding intact PPF. A certain splicing margin should be reserved during cutting to ensure the tightness of subsequent splicing.
2. Old Film Removal and Base Cleaning: Carefully remove the cut old film to avoid damaging the original paint. After removal, use professional glue remover to clean the residual glue, then thoroughly clean the base with cleaning agent to ensure the base is dry, clean and free of impurities.
3. New Film Cutting and Lamination: According to the size of the removed old film, accurately cut a new film consistent with the material and model of the original PPF. Before lamination, evenly spray installation fluid on the base, adjust the position of the new film to ensure alignment with the surrounding old film. Then use a professional scraper to expel the air and installation fluid in the film, making the new film closely adhere to the base.
4. Seamless Splicing and Polishing: At the joint between the new film and the old film, use a special edge pressing tool to compact the joint to ensure no gaps or bubbles. Finally, polish the entire replacement area and its surroundings to make the gloss and flatness of the new film consistent with the old film, achieving the effect of “seamless repair”.

III. Key Points for Choosing PPF Repair Technology: Avoid These Mistakes

• Reject “One-Size-Fits-All” Replacement: Some unscrupulous merchants, in pursuit of high profits, will persuade car owners to replace the entire PPF on the grounds that “large scratches cannot be repaired”. In fact, most large scratches can be restored through professional repair technology. Only when the PPF is severely damaged, aged on a large area, or the repair cost is close to the replacement cost, should overall replacement be considered.
• Identify Matching Repair Materials: Different brands and models of PPF have differences in coating materials and glue formulas. During repair, it is necessary to select repair fluids, new films and other materials matching the original film. Otherwise, compatibility issues will occur, leading to easy peeling, yellowing and cracking of the repair area.
• Choose a Professional Construction Team: PPF repair technology has high requirements for the experience and technical level of the construction master, especially seamless splicing technology, which requires professional training to master. It is recommended that car owners choose regular auto detailing shops with formal qualifications and rich repair experience to avoid secondary damage caused by improper construction.
• Pay Attention to Post-Repair Maintenance: After the repair is completed, it is necessary to follow the maintenance suggestions of the construction master, such as avoiding direct high-pressure water impact on the repair area and not performing polishing and waxing operations in a short period of time, to ensure that the repair coating or new film can be stably cured and extend its service life.

IV. Conclusion: Professional Repair, Renew Your PPF