Slight sagging : abrade off the sagging area, then apply compound (fineextra fine ) SaggingMeasuresPrecautionsRemedies Make set-to-touch time faster Use proper thinner to avoid excessive coating.Overall sagging : abrade off whole area, and refinish.Adjust spray pattern, gun distance, and gun speed to proper level. Sagging (cause-result analysis chart)SaggingApplication workCircumstancesMaterials Facility & EquipmentToo slow evaporation of thinnerThick paint filmToo big size of spray gun nozzle (insufficient atomization pf paint)Low temperature of car bodyLow temperatureDefective spray patternLow spray pressureToo much spraying emission volumeToo short spray gun distanceDefective spray patternToo low viscosity of paint SaggingSubstratePaint filmPaint film partly becomes too thick and the paint sags. Orange peelMeasuresPrecautionsRemedy Slow evaporation speed of solventMaintain liquidity of paintApply water sanding (#800#1000), and polish up gradually with compounds (MediumFineExtra fine).Decrease viscosity of paint. Orange peel (cause-result analysis chart)Orange peelCircumstancesApplication worksMaterialsFacility & EquipmentLow liquidity of paintHigh temperatureToo fast blowing speedHigh temperature of car bodyThin paint filmLow spray pressureInsufficient spraying emission volumeToo fast gun speedToo long spray gun distanceToo high viscosity of thinnerToo quick evaporation of thinnerToo big size of spray gun nozzle (insufficient atomization of the paint) Defects of spray pattern (insufficient cleaning of spray gun) Orange peelPaint surface become uneven like orange peel.
#Fisheye paint defect free
Poppingĭust (cause-result analysis chart)DustFacility & EquipmentMaterialsCircumstancesApplication worksInsufficient cleaning of the painting work floorDusty working clothesInsufficient filtration of paintShortage of booth air pressureDefects of booth filtersInsufficient cleaning of spray gunsDefects of air cleanerInsufficient cleaning of car bodyTrash of masking papers (newspapers, etc)Insufficient cleaning of spray gunĭust (Nibs)MeasuresPrecautionsRemedy Keep painting area clean, and free from trashes and dusts.Wear anti-dust working clothes, and use proper masking paper and tapes.Abrade off small nibs with a knife or grinding stone, and polish it up with compoundsPrevent working area from floating dusts by watering the floor before painting. Paint Defects 1(1) Cratering(2) Dust (nibs)(3) Orange peel(4) Sagging(5) Poor opacityĬratering / Fish-eyesCratering and Fish-eyes occurs partly on the paint surface, and the film becomes uneven.Ĭratering / Fish-eyes (cause-result analysis chart)CrateringApplication workPaint / PuttyDryingOthersPoor drying of puttyThick application of lacquer type puttyInsertion of polyester putty between lacquer paint filmsToo thick application of excessively diluted paintsStrong dissolvability of topcoat paint.Absorptive puttiesExcessive adding of non-blushing thinnerPoor sanding of puttyĬratering / Fish-eyesMeasuresPrecautionsRemedy Most of the troubles can be resolved by avoiding the factors Slight fish-eyes shall be repaired with dry mist spraying.Large sized (cratering) shall be abraded off completely after drying, and repaint.CircumstancesFacility & EquipmentApplication workMaterialsĭust (Nibs)Popping appears on the film surface.
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