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3, the necessary four elements of car paint polishing:
Whether you can polish a car requires the following comprehensive capabilities:
1 Judgment of different paint finishes: degree of oxidation, degree of scratch on the paint surface, and origin of the vehicle (for example, the paint surface conditions of Japan, Germany, the United States, and China must be different)
2 Selection of abrasives: different origins, different formulations, and different effects.
3 Matching of polishing discs: wool disc, medium sponge disc, reduction disc.
4 Master technical problems: accumulated experience in long-term construction.
Understand the different paint conditions, choose the right abrasive, match the corresponding polishing disc, use its own technical level, in order to better repair the defects of the paint surface, and perfectly show the paint surface effect.
4, the judgment of the paint surface scratch:
1 Hairline marks: Fine scratches caused by car washing, car cleaning or slight rubbing.
2 Shallow scratches: The topcoat is broken and the scratches that do not leak the primer are shallow scratches. There is a feeling when touched by hand.
3 Moderate scratches: The topcoat is broken and the scratches that leak the primer are moderately scratched.
4 Deep scratches: The scratches that have leaked out of the car's iron plate are deep scratches, and the polishing can't be repaired.
5, the understanding of abrasives and polishing agents:
The abrasive polishing agent can be roughly classified into two types, one being an oily abrasive and the other being a water-soluble abrasive.
1 oily abrasive: insoluble in water, low cost, large amount, some oily abrasives have the effect of masking scratches, can not really remove scratches, after washing 2 times, the scratches and bare leaks.
2 Water-soluble abrasive: It is soluble in water and can be sprayed while spraying. The cost is high and the dosage is saved. During the construction process, you can see if the scratches are really removed, and actually repair the scratches and defects of the paint surface.
The type of abrasive polish can be divided into:
1 coarse polishing agent: contains fine particles, which can remove deep oxide layer and slight scratches and pitting when painting.
2 Medium polish: Finer than finely ground particles to remove light scratches on the paint surface.
3 Polishing agent (reducing agent): Ultra-fine, increase the brightness of the paint surface and restore the original gloss of the paint surface.
Note: Do not think that the larger the particles, the stronger the ability of the abrasive. Due to the high alumina content of the abrasives in Japan, the abrasives are superfine, but the scratching ability is very strong.
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The main components of the abrasive are: silicon, silica and alumina; the main origin: domestic, the United States, Europe and Japan.
1 The domestic and American picking ingredients are silica, which is cheap and throws dust.
2 Europe's main component of alumina, high cost performance, less dust during polishing, due to the formulation, it feels very oily.
3 Japan's main ingredient is also alumina, the quality is very good, the workmanship and dosage are the best, but the price is more expensive.
6, the understanding of the polishing disc:
Grinding and polishing discs are roughly divided into three categories: coarse, medium and glazed (reducing disc):
1 rough polishing often uses hard sponge disc or wool disc (short wool, long wool) to kill, and with appropriate abrasives can effectively remove scratches and traces left by sandpaper;
2 The polishing is often done with a sponge disc, which is soft and moderate in strength, which can effectively remove the scratches left by the thick disc.
3 glazing (reduction) often uses ultra-fine sponge disc, very soft, almost no lethality, can remove the fine lines left by the medium disc, effectively increase the brightness of the paint surface and restore the original luster.
7, polishing tips:
1 Do not use inferior, fake abrasives.
2 Use a good quality disc, a more delicate polishing disc.
3 With a water-soluble abrasive, the cover will be relatively small, and the scratches will be discarded, which can be observed during the construction process.
4 After polishing, you must make maintenance supplies, otherwise it will be streaking like a computer.
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