Yüzey Kusurları Yüzey Kusurları
Dust Problem
Dust Problem

Reasons 

  • Dust particles from the medium or the vehicle during application 
  • Dust from spray suit 
  • Dirty cabin walls 
  • Dirty cabin filters 
  • Dirty air piping 
  • Low cabin pressure 
  • Electrical charge buildup in plastic parts 

Removal 

  • The dusts should be removed via polishing after drying 
  • If there is too much dust, recoating should be applied. 
Spray Dust - Overspray
Spray Dust - Overspray

Reasons 

  • The use of a thinner that is faster than required 
  • Fast application and large application distance 
  • Very small nozzle diameter 
  • Insufficient airflow inside the application cabin 
  • Dirty or faulty spray gun 

Removal 

  • May be removed via polishing 
  • Polishing should be made after sanding for greater problems. 
Solvent Pops
Solvent Pops

Reasons 

  • The use of a thinner that is faster than required 
  • Thicker application than necessary 
  • Insufficient Flash off times 
  • Applying heat for drying right after application 
  • Higher drying temperature than necessary 
  • Keeping the device too close to the surface during infrared drying 

Removal 

  • The problematic region should be sanded and recoated 
Insufficient Drying
Insufficient Drying

Reasons 

  • Insufficient degreasing and cleaning procedures  
  • Use of improper hardener 
  • Use of too much or insufficient hardener 
  • Thicker topcoat than necessary 
  • Very short drying time 

Removal 

  • The required drying time and temperature should be applied 
  • If drying does not take place, the surface should be cleaned with a thinner, sanded and recoated. 
Floating
Floating

Reasons 

  • The use of a thinner that is slower than required 
  • Thicker application than necessary 
  • Larger nozzle diameter than required 
  • Shorter application distance than required 
  • Very low ambient or surface temperature 
  • Shorter flash off time than necessary 

Removal 

  • If the coating is still wet, flash off time should be given and the surface should be recoated with a single layer 
  • If the coating has dried, the surface should be sanded prior to recoating 
Color Difference
Color Difference

Reasons 

  • Improper preparation of the color 
  • Insufficient hiding power  
  • Higher or lower application pressure than required 
  • Not mixing the coating well 
  • Wrong color selection 

Removal 

  • The surface with the color difference should be coated with the correct color. 
Cratering
Cratering

Reasons 

  • Insufficient degreasing or cleaning procedures 
  • Using dirty cloths 
  • Pressurized air containing water and  Basınçlı havanın su ve yağ içermesi
  • Silicon contamination on the coated surface 
  • Dirty application equipment 

Removal

  • The surface should be sanded and recoated after cleaning procedures. 
Low Gloss
Low Gloss

Reasons

  • Insufficient cleaning of grease, resin or other similar substances from the surface 
  • Insufficient drying of the primer before sanding 
  • The use of a faster thinner or hardener than required 
  • Very long baking time or baking temperature 
  • Not considering the required flash off times 

Removal

  • Gloss may be increased via polishing. If this makes no impact, the application should be repeated after sanding. 
Water Marks
Water Marks

Reasons

  • Water splashing to the coated surface that has not yet fully dried 
  • Moisture from the pressurized airline 
  • Water splashing to the surface during cooling after drying 

Removal

  • The surface should be polished until the marks are removed. If this is not sufficient or if the problem repeats, the surface should be sanded and recoated. 
Mottling
Mottling

Reasons

  • Use of improper hardener or thinner 
  • Use of a thinner slower than required 
  • Selecting a nozzle diameter larger than required 
  • Improper pattern adjustment on the spray gun 
  • Improper overlapping during application 
  • Shorter flash off time than required prior to clear coat application 
  • Thicker basecoat application than required 

Removal

  • Application should be repeated 
  • The mistakes observed during application should be corrected to eliminate the problem. 
Cracking
Cracking

Reasons

  • The coating applied on a surface with microcracks 
  • Using more hardener than necessary 
  • Applying the primer without mixing thoroughly 
  • The application made on the primer sanded before it has fully dried 

Removal

  • The coating layers on the problematic area should be sanded completely and the application should be repeated correctly. 
Orange Peel
Orange Peel

Reasons

  • Higher application viscosity than required 
  • The use of a thinner that is faster than required
  • Very high or very low spray pressure 
  • Larger nozzle diameter than necessary 
  • High ambient temperature 
  • Large application distance 

Removal

  • Slight orange peels may be removed by polishing 
  • More severe orange peels should be removed by first sanding the surface followed by recoating. 
Sagging
Sagging

Nedenleri

  • Gereğinden daha yavaş tiner kullanılması
  • Boyanın gereğinden fazla inceltilmesi
  • Uygulamanın çok yavaş yapılması
  • Gereğinden daha kalın boya uygulaması
  • Boya veya yüzeyin çok soğuk olması
  • Meme çapının gereğinden büyük olması
  • Flash off sürelerinin gereğinden daha kısa tutulması
  • Uygulama basıncının gereğinden daha düşük olması

Giderilmesi

  • Boya kuruduktan sonra akma izleri zımpara ve polişleme yardımı ile giderilebilir.
  • Sorun bu şekilde giderilemiyorsa yeniden boyama yapılmalıdır.
Condensation
Condensation

Reasons

  • Rapid cooling of the surface due to the use of a very fast thinner leading to condensation on the surface 
  • Rapid cooling of the surface due to high spray pressure leading to condensation on the surface 
  • Working in a very humid or very cold environment 
  • Conducting the assembly procedure before the coating has dried sufficiently leading to the infusion of the outside moisture to the coating 

Removal

  • Polishing may be used for its removal, for other cases the topcoat should first be sanded followed by recoating. 
Low Hiding Power
Low Hiding Power

Reasons

  • Insufficient mixing of the coating 
  • Thinner application than required 
  • Irregular spraying 
  • Thinning the coating more than necessary 

Removal

  • Recoating should be made until the required hiding power has been attained. 
Weak Adhesion – Topcoat
Weak Adhesion – Topcoat

Reasons

  • Improper surface cleaning 
  • Insufficient or thin sanding 
  • Failing to select a proper primer 
  • Thicker topcoat application than required 

Removal

  • The region with low adhesion should be sanded and recoated with the correct system. 
Weak Adhesion – Basecoat Clearcoat
Weak Adhesion – Basecoat Clearcoat

Reasons

  • Applying a thicker basecoat film than required 
  • Insufficient flash off time 
  • Too dry application of the mist layer of the basecoat 
  • Too dry application of the first layer of the clearcoat 

Removal

  • The region with low adhesion should be sanded and recoated with the correct system.