Symptoms
Contamination of the substrate
(e.g. silicone, grease, wax) causes
surface defects . This results in
areas where the coating does not
form a complete film over the
substrate.
Cause
-
Often a silicone or wax
contamination
-
Surface not cleaned sufficiently
before application
-
When spray-applied: poor film
formation
-
Open pored timber
Solution
Clean surface with a suitable emulsion cleaner or silicone remover where appropriate. It may be necessary to remove affected coatings. Primer or base stain should be worked/brushed well into open pored timbers.