CHALKING
Unveiling pigments due to the progressive degradation of film forming substance.
Causes
- poor quality coat material (abnormal pigment or resin),
- wrong amount of hardener,
- aggressive substances from the natural environment,
- improper care of coating.
Prevention
- use proven materials,
- use an appropriate amount of hardener,
- treat coating regularly with suitable means.
Repair
Minor defects polish, sand and coat again.
