Craters

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