Definition - What does Silking mean?
Silking refers to a type of coating defect that is observed on surfaces. It is characterized by fiber-like shiny irregularities that form parallel to the direction of brushing used to apply the coating.
Silking is facilitated by fillers with big particle sizes. Surface tension differences may also be a source of silking, particularly when dipping is used to coat metal surfaces.
Corrosionpedia explains Silking
Certain additive substances can be used to prevent the formation of silking on metal surfaces. These substances are solvent-based with active epoxy, alkyd or vinyl components. They facilitate substrate wetting, flow and level, and color uniformity.