Coating defects

• Too short flash off times between the coats
• Too thick primer coat
• Water polluted compressed air
• Too high air humidity (over 80 % at 2K materials)
• Condensed water due to temperature fluctuations in the compressed air installation 

• Flash off between coats min. 5 -10 min/20°C, or until surface is mark free
• Compressed air should be dry and clean
• Avoid the formation of condensed water in the air installation. Keep a stable temperature and humidity

• Sanding of the primer with unsuitable (too rough) abrasive paper
• Sanding of the substrate with unsuitable (too rough) abrasive paper 
• Insufficient putty isolation prior to application of the top coat
• Too low viscosity of top coat

• Use abrasive paper of prescribed grit
• Sanding marks with a fine abrasive paper
• Isolate thoroughly puttied repairs with filler
• Follow the prescribed viscosities of top coats
• Follow the prescribed drying times
• Follow the prescribed coating thickness

• Poorly prepared, contaminated surface (grease traces, finger prints, dust etc.)
• Use of the materials, which are not suitable for certain types of substrates
• Thinning of material with unsuitable (not original) thinner

• Clean surface thoroughly before painting
• Always check which material is suitable to a certain type of substrate
• Use of recommended thinners

• Not dried through, not cured old coat
• Too thick thickness of old coating

• Follow the prescribed drying times
• Follow drying through times with synthetic (KH) coats
• Isolation of problematic surfaces
• Follow the prescribed thickness for coats

• Incorrect material viscosity 
• Too thick film thickness 
• Unsuitable spray gun (nozzle), pressure
• Too cold material or substrate or too low room temperature
• Use of unsuitable thinner

• Follow technical instructions for use
• Use a suitable spray gun
• Warm the object and material to room temperature +20°C
• Use of a recommended thinner

• Wax, grease, silicone contaminated surface
• Compressed air contaminated through condensed water or oil residue
• Use of silicone, polishing agents or sprays in the vicinity of painting area
• Insufficiently cleaned surface before coating

• Before coating clean the surface thoroughly with Anti silicone cleaner 
• Regular maintenance of oil and water separators (filters)

• Too high air humidity
• Surface soaking
• Hardener defects – hardener reacted with air humidity
• Humidity in compressed air supply

• Follow technical instructions for the application of material
• Keep hardener cans sealed properly
• Enable sufficient air flow (during drying)
• Follow drying times
• Use the recommended hardener

• Unsuitable (too high) viscosity
• Unsuitable application technique
• Unsuitable working temperature
• Use of unsuitable thinner
• Unsuitable spray gun (nozzle), pressure

• Follow technical instructions for use – viscosity and temperature
• Use of prescribed spray gun (nozzle)
• Use of prescribed thinner

Repair of incurred damage:

• Sand to filler and repeat painting of top coat as prescribed

• Incorrectly dried-through filler
• Trapping of solvents and air because of too high film thickness
• No flash off between coats
• Wrong hardener and thinner
• Interrupted drying (not following drying time)

• Apply the prescribed coat thickness
• Wait between the first and the second coat 10 – 15 min/20 °C or until mark-free surface
• Regular check of activation and temperature of a drier
• Follow prescribed flash off times between coats and final flash off
• Use the prescribed hardener and thinner

• Sand to sheet metal and repeat painting of top coat

• Isocyanate hardener for 2K materials reacted with air humidity

• After opening the packaging with isocyanate hardener, use it up as soon as possible or
• Close well
• Before repeated use of hardener from the already opened packaging: check hardener, which should be clear, colourless and without any floating particles

• Sand to filler and repeat painting of top coat

• Mixing of enamels produced with different binders (resins), which are incompatible or only partially compatible. Example: MOBIHEL Enamel and MOBIHEL 2K acrylic enamel (defect size depends on ratio of different materials)

• Follow instructions for product use
• Mix only mixing enamels from the same quality series of MIX-es

• Sand to filler and repeat painting of top coat

• Too heavy coats
• Low ambient temperature 
• High relative humidity

• Follow instructions for product use

• Insufficient colour coat thickness or number of colour coats applied
• Too much thinner added to colour

• Apply the prescribed coat thickness 
• For pigments with poor hiding power use coloured filler
• Follow instructions for product use