Coating defect: fine parallel irregularities in a paint film that give the appearance of silk. This defect usually is a special case of floating and flocculation in coating finishes.
A defect in coatings saused by the tendecy of pigment particles in the film to concentrate or settle, as the coating flows away from the edges or holes in the substrate. This is usually caused by a heavy application of a low viscosity coating.
A surface defect which results in parallel flow lines in the paint film.