Dry goods . . . Automotive coating coating defects should be fully addressed.

Water spot
:
of the vehicle is often formed by white ring-shaped water droplets, and rarely appear on the side of the vehicle. Occasionally, water droplets fall behind, and the coating film is dry and produce streak marks. Water spots can also appear on windows or trims

.
causes:
droplets (rainwater, tap water or well water used for car washes) contain calcium and silicon, and when the water evaporates, the remaining white sediment is concentrated around the droplets.
repair method:
washing: cleaning the vehicle, removing dirt and dirt from the coating surface.
: Polish the coating surface with a polish to remove water spots that remain on the vehicle after washing the car.
:
the vehicle in the shade and wipe off all water droplets that remain on the vehicle after washing it. After spraying, park the vehicle indoors until the coating is completely dry, avoiding contact between the coating surface and rainwater.
pollen spot
:
pollen spot creates slight wrinkles and white dirt on the surface of the coating film. Although mostly occur on the horizontal side of the vehicle, it is also formed on the side of the vehicle in the direction in which the wind transports pollen. When pollen falls on the surface of the coating and is mixed with water, a speckled pollen spot occurs, and individual pollen forms small spots on the film surface.
:
When pollen falls on the surface of the coating film in contact with water, it causes the pollen shell to crack and the phosphage to flow out, and the phospheric will contract when it is dry and deform the coating surface.
Repair Method:
Wash: Clean the vehicle, remove pollen left on the coating surface
Heat: Heating the coating surface (70-80"C, 10 minutes) to release stress to remove defects
Polishing: Polishing the coating surface with a polish to remove any residual dirt
Countermeasures:
Put a layer of protective wax can effectively protect the paint
bird shit
features:
this kind of damage is only due to the bird or insect excreta and film contact, will form a paint surface bulging, cracking and peeling phenomenon, because the excreta contains different ingredients. Although defects are mostly formed on the horizontal surface of the vehicle, they are also formed on the vertical surface due to the influence of the wind. Depending on the temperature of the exterior plate of the vehicle or the part of the excreta, the cracking occurs about one week after contact.
: The
acid in the excreta penetrates into the coating film, causing the coating film to bulging. In addition, organic acids separate the molecular structure of the coating film, coupled with temperature changes, ultraviolet light and moisture, which can eventually lead to cracking and peeling of the coating film. The extent and shape of damage on the coating surface will vary greatly depending on the type of bird or insect or their food.
repair method:
: Heating the coating surface to allow the moisture and organic acids deep into the coating to evaporate.
: If there is a residual bulge, grind the bulge and polish it with a polish.
: Use approximately 1500 sandpaper to remove defective areas and re-spray them.
of
powder:
type of defect is the display of small red rust spots on the horizontal surface of the vehicle. It feels rough and can't be washed away with water. When the rust remover is applied to the coating surface, the color of the rust spot changes to a slightly red-purple color.
cause:
If the vehicle is parked close to a railway or ironworks that produces iron powder, the iron powder may come into contact with the body coating film and attach to the coating film and rust, which in turn erodes the coating film.
repair method:
apply rust remover: use rust remover to remove iron powder from the coating surface. Rust removers use chemical reactions to convert iron powder into red rust (iron oxide). However, it does not completely remove iron powder. Use iron-removal clay: Use iron-removal clay to remove rusty iron powder that has sunk into the coated surface.
polishing: Polishing removes minor scratches from the coating surface.
Smed stone damage
features:
When the vehicle is moving, some small stones hit the coating film and cause the coating film to peel off, which often occurs on the front edge of the vehicle bonnet or roof. If a small stone bullet jumps, it may also damage the car sill plate, the under-door panel or the outer plate part of the wheel arc, the peeling part of the coating film usually forms a sharp or jagged surface. Occasionally, small stones cause small dents in the middle of the area.
: When
vehicle is moving, the small stone hits the coating surface, resulting in the coating film peeling off.
repair method:
grinding: grinding defective areas until the surface is smooth. If there is rust, the rust needs to be completely removed.
: Re-spray the area with a color-adjusted coating.
:
simple way is to carry out local repair in the damaged area, and then protruding parts of the grinding and polishing.
features of fading or
:
a long time after the vehicle has been in use, the coating film will lose light. (Faded) light paint changes to a slight yellow color. The coating surface will turn white, powdered and has no luster.
: This
defect is caused by UV rays, high temperatures and moisture causing the resins and pigments in the coating film to go bad.
is caused by the discoloration of pigments, yellowing is due to ultraviolet radiation leading to the quality of the resin, whitening and powdering is due to the discoloration of the resin and become powdery.
method:
polishing: Use polishing work to remove defect layers.
: If polishing still does not fix the defect or if it is repaired and then re-occurs, the defect layer is removed and re-sprayed in the area.
:
park your vehicle as far as possible on the roof. When re-spraying, replace the nitro coating with a two-part acetylene amino acid coating.
of
:
when foreign particles fall into the inside of the coating film, the coating surface will form a convex shape. This type of defect creates many different convex shapes depending on the type and shape of the foreign particles.
:
During the coating process, dust or particles around the work area are attached to the coating film, a defect that occurs when it remains hardened on the coating film. It is also possible that foreign particles have long been mixed with coatings to cause such defects.
repair method:
grinding: use abrasive stone or 2000 sandpaper to grind the material.
polishing: use a polish to polish and remove sandpaper marks.
: If the grinding takes on a different color, use appropriate sandpaper (about 400 sandpaper) to grind the area and then re-spray the area.
:
clean the paint area at all times and thoroughly clean the paint room before moving the vehicle into the paint room. Sprayers are required to wear a dust-free clothing and the filters in the paint room must be changed regularly.
characteristics
:
of paint before the coating film is dried.
:
paint thinners when coating thick may also produce a slow-drying thinner.
repair method:
grinding: grinding defects using grinding stone or 2000 sandpaper until smooth.
polishing: Polish with polish to remove sandpaper marks.
: If the area of the flow is too large or contains bubbles, grind the defective area smoothly and then re-spray the area.
countermeasures:
gun should be used under appropriate spray conditions. When diluting coatings, use appropriate conditions and appropriate amounts of thinners. Spray - second, the film thickness should not be too thick, should be sprayed multiple times, until the standard film thickness is reached.
fish
features:
this type of defect can create a crater-like depression on the coating surface.
:
surface is not properly cleaned and oil stains or silicon remain on the coating surface before spraying.
if oil stains (or silicon) remain on the surface of the coating, the coating will not be attached to the coated surface, resulting in fish eyes.
repair method:
grinding: grinding defective areas until the surface is smooth.
: Re-spray the area with a color-adjusted coating.
:
clean and skimm the surface of the coating thoroughly before spraying. After degreasing, the hand must not touch the coating surface. Do not carry out lighting operations in the coating work area.
Semost Powder Unemodying
Features:
When reflective pigments (aluminum or pearl mica pigments) in silver or pearl paint float, silver powder reflow is unealful.
Cause:
In the coating process, in the coating film reflective pigment arrangement is not coordinated gun operation resulting in the film thickness unequist coating film needs to take a long time to harden the case, spraying too thick to add excessive diluent or use slow-drying thinner coating film surface static electricity generation.
repair method:
slightly increase the gun distance to eliminate silver powder unequidity. Give the coating enough drying time and spray the varnish. In accordance with the instructions of the paint manufacturer, give the coating film the prescribed drying time. Grind the surface with the appropriate number of sandpaper (approximately 1500 sandpaper). Re-spray the area.
:
gun operating techniques and spray conditions to maintain stability. Use anti-static degreasing agents.
use appropriate thinners and dilutions to dilute the coating.
characteristics of
skin:
such defects are the phenomenon of orange peel on the surface of the coating film. However, the orange leather pattern presented by the anti-sand coating used in the under-door panels and sill panels is not a membrane defect.
: when
coating film has hardened before leveling;
when the viscosity of the coating is too high, use paint thinners with an inappropriate volatility rate:
too high air pressure or too far away from the gun;
if the temperature of the coated surface is high.
repair method:
grinding: use 2000 sandpaper grinding coating film to ask the way, until the surface is smooth.
polishing: use polishing work to adjust the pattern, if previously implemented grinding work, sandpaper marks must be removed.
: Use the appropriate number of sandpaper (about 1500 sandpaper) to grind the part to be ground, and then use a color-adjusted coating to re-spray the part.
Solvent bubbles
features:
such defects can form small holes in the coating surface or create a group of bubbles, solvent bubbles often occur on a horizontal surface or at the edge of the steel plate coating thicker parts. If the coating is finished, the coating film is immediately forced to dry, the coating film inside before drying, the coating surface has hardened. When the internal solvent is to play the hair, it will accumulate on the hardened coating surface, resulting in bulging phenomenon. Moreover, small holes are formed when the solvent penetrates the coating surface.
repair method:
grinding: grinding defective areas until the surface is smooth.
: Re-spray the area with a color-adjusted coating.
countermeasures:
in accordance with the instructions of the paint manufacturer to use the paint temperature, select the appropriate thinner, and adjust the viscosity of the coating, to give sufficient time to sit. Give the base coating a thorough drying.
pinhole
features:
If the coating surface already exists small holes, and the outer coating film can not fill it, so there will be a depression on the coating surface.
cause:
pinhole appears in the paint or atomic ash.
repair method:
grinding: use 2000 sandpaper to grind the defective part smoothly.
: Remove defects/sandpaper marks with polishing work.
: Grind the area with the appropriate number of sandpaper (about 1500 sandpaper) and then re-spray the area with a color-adjusted coating. A simple method is to carry out local spraying on the recessed part, grind out the protruding part, and polish the surface.
:
applying atomic ash, apply hard not to allow air to mix into atomic ash;
sandpaper marks
features:
sandpaper used to grind the bottom coating of sandpaper marks cannot be filled with coated film. According to the way sandpaper moves or the pneumatic grinding tool used, there are straight lines, curves, spiral sandpaper marks.
Causes: Sandpaper marks used in the
abrasive base coating cannot be filled with coated film: if the base coating starts grinding before it is thoroughly dried, and then spray the paint;
repair method:
grinding: use 2000 sandpaper to remove sandpaper marks.
: Remove with polished work sandpaper marks.
: Grind the area with the appropriate number of sandpaper (about 1500 sandpaper) and then re-spray the area with a color-adjusted coating.
:
use the appropriate number of sandpaper for each procedure. Give the base coating enough drying time. Select the appropriate thinner form, adjust the viscosity of the coating according to the instructions of the paint manufacturer, and sub-spray the fraction.
of atomic ash marks
:
of atom ash patching appears after the paint is sprayed. If different bulging ratios occur between atomic ash in the old coating film, due to the infiltration of solvents, contraction will occur along the feathered edge, which is how atomic ash marks are produced.
: The
ash is not dry enough.
the old coating film is in the form of nitro, or a spray of thick medium primer or finish, will lead to the occurrence of polyester putty marks.
repair method:
grinding: use 2000 sandpaper to grind the defective part smoothly.
: smooth with the pattern of the polished clean defect site.
spray sandpaper with the appropriate number (about 1).