A piece in a 4S shop costs about 2, yuan, and a small piece in a paint repair shop outside costs about 3 to 5 yuan, which is more expensive for big stores. However, it's not more than 5 yuan for big stores. If the injury is not serious, try to cut the light, and if there are some places where the car paint surface can recover quickly, it can be done. Matters needing attention in quick repair:

(1) Primer: Before spraying varnish, the substrate must be thoroughly dried and then sprayed with varnish, otherwise the paint surface will be tarnished easily.

(2) color paint: one-component color paint must be used for quick repair.

(3) varnish: the spraying air pressure should not be too high (2-2.5KPa) and the standing time should be 1-2 minutes each time, depending on the ambient temperature of spraying. The lower the temperature, the longer the standing time, and the shorter the standing time. The spraying thickness should be 1.5-2 times, otherwise it is not easy to dry. After the varnish is sprayed, it must stand for 5 minutes before baking.

(4) baking: the distance between the UV lamp and the parts should be 2-25CM. If the distance is too far, the curing will be too slow; if the distance is too close, the curing will be fast, but the shrinkage will be fast, which will easily lead to orange lines and loss of light. For the convex and concave parts and curved parts of the parts, the baking angle should be changed according to the shape, and it cannot be omitted.

the p>UV lamp can't be turned on immediately when it is powered off or turned off during baking. It will take several minutes to turn it on because the temperature of the lamp tube is very high, and it will have to wait until the temperature drops. Wear special protective mask or glasses when ultraviolet rays are harmful to eyes.

(5) grinding: when grinding, use P15-P2 beauty sandpaper to grind the dust spots and polish them completely until they are dull (it is recommended to use dry grinding equipment, and if it is a water mill, use more water to prevent scratches caused by sandstones), and lightly grind the joints.

(6) grinding and polishing: the newly sprayed paint surface can't reach 1% curing after drying, so it's not advisable to polish a single area for too long, and the surface can't be overheated by touching it with hands, which may lead to gloss loss.

(7) Abrasive: Abrasive containing no silicon and wax should be used, otherwise, pits will appear on the surface when the varnish is sprayed, and light polishing will lead to rework.