Geely EC718, EC718RV, EC715, EC715RV. Manual part — 543

12.13.3 Diagnostic Information and Procedures
12.13.3.1 Common Paint Defects and Treatment

Note

Adding black box in the table indicates the treatment.

Defects

Causes

Treatment

Powder

1. Film subject to strong erosions, such as

the strong ultraviolet radiation.

2. Incorrect ratio in the paint mixture.

3. Coating low resistance to sun and bad

weather.

4. Vehicle is not cleaned regularly or

thoroughly.

5. Incorrect choice of car cleaning agents

or polishing wax too coarse.

1. Polishing

2. Conventional grinding and polishing

3. Deep grinding and finesse polishing

4. Local paint repair

Plastic Paint Peeling

1. Poor adhesion between the coating and

the substrate or outer coating too hard

2. Coating too thick or erosion caused by

water vapor, acid and alkali in the air

3. Under coating treated incorrectly;

pinholes and defects in the outer paint
layer

1. Polishing

2. Conventional grinding and polishing

3. Deep grinding and finesse polishing

4. Local paint repair

Cracking

1. Primer inadequately stirred

2. Spray paint too thick

3. Middle coating too thick

1. Polishing

2. Conventional grinding and polishing

3. Deep grinding and finesse polishing

4. Local paint repair

Bird Droppings

Erosion

1. Bird droppings erosion

1. Polishing (mild erosion)

2. Conventional grinding and polishing (medium erosion)

3. Deep grinding and finesse polishing

4. Local paint repair (severe erosion)

Scratch

1. Film with low hardness

2. Hard objects scratch

1. Polishing (minor scratches)

2. Conventional grinding and polishing (thick scarring)

3. Deep grinding and finesse polishing

4. Local paint repair (scratched)

Body, Sheet Metal and Painting

Paint/Coatings

12-161

Defects

Causes

Treatment

Corrosion

1. Thin film edges

2. Corrosion at minor collided areas

3. Acid and alkali erosion

1. Polishing

2. Conventional grinding and polishing

3. Deep grinding and finesse polishing

4. Local paint repair (serious rusted metals need to be

repaired before painting)

Paint Peeling

1. Poor adhesion between the coating and

the substrate or outer coating too hard

2. Coating too thick or erosion caused by

water vapor, acid and alkali in the air

3. Under coating treated incorrectly

4. Pinholes and defects in the outer paint

layer

1. Polishing

2. Conventional grinding and polishing

3. Deep grinding and finesse polishing

4. Local paint repair (serious rusted metals need to be

repaired before painting)

Acid Rain Erosion

1. Acid rain erosion

1. Polishing (mild erosion)

2. Conventional grinding and polishing (medium erosion)

3. Deep grinding and finesse polishing

4. Local paint repair (severe erosion)

Gloss

1. Film eroded by the acid, alkali, electric

arc, sea water and other strong
corrosive salty spray

2. Incorrect maintenance methods in harsh

conditions

3. Poor paint durability

4. Incorrect paint mixture ratio, paint

durability deterioration

1. Polishing (mild loss of light)

2. Conventional grinding and polishing (moderate loss of

light)

3. Deep grinding and finesse polishing

4. Local paint repair (severe loss of light)

Bubbling

1. Film exposed to a humid environment for

a long; water vapor infiltration into paint
film; water and gas bubbling when
temperature rises

2. Corrosion caused by infiltrated materials

3. Fuel, acid, alkali and other erosion

1. Polishing

2. Conventional grinding and polishing

3. Deep grinding and finesse polishing

4. Local paint repair (serious rusted metals need to be

repaired before painting)

12-162

Paint/Coatings

Body, Sheet Metal and Painting

12.13.4 Removal and Installation
12.13.4.1 Common Coating Film Defect
Treatment Example

FE12-1045b

1.

Before polishing, clean the surface with de-greasing
materials.

FE12-1046b

2.

Firstly fully soak a sponge and squeeze excessive water.

3.

Apply a small amount of polishing wax to the surface and
adjust the polishing machine speed.

FE12-1047b

4.

Put the sponge onto the surface, turn on the machine with
a speed at 2,500-3,000 r/min. Gently press the sponge to
polish for 3-5 s.

Note

During operation, keep the machine stable and
move gently. Do not work too long to avoid
overheating, as the paint will be damaged by the
heat.

5.

Use a cleaning cloth to wipe the excessive wax.

Body, Sheet Metal and Painting

Paint/Coatings

12-163

12.13.4.2 Conventional Grind and Polishing
Treatment Example

FE12-1048b

1.

Before polishing, clean the surface with de greasing
materials.

FE12-1049b

2.

Apply a small amount of polishing wax to the surface and
adjust the polishing machine speed.

FE12-1050b

3.

Put the wool ball onto the surface, turn on the machine
with a speed at 2,500-3,000 r/ min.

Note

During operation, keep the machine stable and
move gently. Do not polish too long. Keep the
polishing time as short as possible, the polishing
area as small as possible.

4.

Firstly fully soak a sponge and squeeze excessive water.
Apply a small amount of polishing wax to the surface. Put
the sponge onto the surface, turn on the machine with a
speed at 2,500-3,000 r/min. Gently press the sponge to
polish for 3-5 s.

Note

During operation, keep the machine stable and
move gently. Do not work too long to avoid

12-164

Paint/Coatings

Body, Sheet Metal and Painting