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Painting and discoloration of automobile interior ceiling
First use a brush to clean the skin with bleach detergent and water, then use clean water, and then use cleaning solvent or ethylene regulator.

Dry the gaps around the skin with compressed air.

When painting, cover the whole engine and trunk lid carefully to avoid paint splashing.

When spraying the primer, the strip spraying method is adopted, the low pressure is 0. 14-0. 17MPa, and the narrow fan-shaped fog spraying is adopted. Increase the air pressure and adjust the fog pattern to the normal state.

When spraying, start from one side of the roof and gradually spread to the middle of the roof, then spray the rest of the roof to the other side of the car, and wet spray it from the middle of the roof to the side, with each gun covering about 50%-70%, which is a full-thickness coating, and then spray the full-thickness wet coating for the second time to completely cover it and make the humidity consistent. Then spray a layer of wet paint on the whole roof with 200% diluted vinyl spray paint, dry lh, then remove the covering paper and dry for 4 hours. Finally, protect the surfaces of roofs and other vinyl materials with vinyl protectants.

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