OTHER DEFECTS

SPOTS OF BLEACHING OF THE TOP COAT

Causes:

  • Too much HARDENER in PE putty.
  • Poorly mixed HARDENER in the PE putty.

Prevention:

  • Check addition of a hardner.
  • Mix thoroughly.

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.

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.

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.