These professional applicators are extremely soft and yet do not lose hairs. The material form which the applicators are made is resistant to all chemicals and can be used for all kinds of surface treatments including blueing.
The applicator ensures that liquid is applied uniformly over the whole surface unlike brushes which can leave smears and smudges. The material holds a surprising amount of liquid and resists dripping so as not to contaminate the workpiece you are working on. The applicators work with all types of oils and chemicals from very thin to very thick all with the same good results.