OTHER DEFECTS

Poor drying

Causes:

  • Too small quantity of hardener added.
  • High air humidity, which increases drying time, also CAUSES clogging of the paper.
  • Material is sagging.

Repair of incurred defect:

  • Sand back to bare metal and repeat puttying according to instructions.

SPOTS OF BLEACHING OF THE TOP COAT

Causes:

  • Too much hardener in PE putty.
  • Badly mixed-in hardener in PE putty.

Prevention:

  • Check addition of a hardener.
  • Mix thoroughly.

Repair of incurred defect:

  • Sand back to bare metal and repeat puttying according to instructions.

BAD ADHESION TO THE SURFACE

Causes:

• 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.

Prevention:

• Clean surface thoCOARSEly before painting.
• Always check which material is suitable to a certain type of substrate.
• Use of recommended THINNERs.

Pinholes

Causes:

  • Incorrect puttying (presence of air or thick coats).
  • Surface not dried through enough.
  • Too thin primer coat.

Prevention:

  • With a spatula, you should press down the putty on the mixing board on the same place several times in order to force out the air.
  • Don’t putty in high thicknesses, you should apply several thin coats.
  • Sand the pinholes or apply putty to them.
  • Always, isolate PE putty prior to application of a top coat.

Repair of incurred defect:

  • sand to bare metal and repeat puttying according to instructions.

SAGGING

Causes:

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

Prevention:

• 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.

Traces of sanding marks

Causes:

  • Sanding of putty with unsuitable (too coarse) abrasive paper.
  • Sanding of old lacquering with unsuitable (too coarse) abrasive paper.

Prevention:

  • Use abrasive paper of the prescribed grit.
  • Sand rough cracks with a fine abrasive paper.

Repair of incurred defect:

  • Sand to bare metal and repeat puttying.