An applicator (10, 10a, 10b, 10c) for punctually applying a coating agent to a surface having one protrusion, the applicator comprising: an elongated portion having a finger-gripping portion on the proximal end and a fibre-bundle reception portion on the distal end, the fibre-bundle reception portion having: - a plate shape having a proximal face and a distal face, the proximal and distal faces being substantially parallel to one another and enclosing a predetermined angle (β) with a longitudinal axis of the elongated portion; and - a plurality of through holes (112a, 112b, 112c) extending between the proximal face and the distal face; a plurality of sub-applicators (12a, 12b, 12c) inserted one-by-one through a respective one of the plurality of through holes, wherein each sub-applicator respectively has: - a plurality of grouped fibers (12af, 12bf, 12cf) so as to receive the coating agent, the plurality of grouped fibers protruding from the distal face; and - a sleeve (12as, 12bs, 12cs) configured to fix the plurality of grouped fibers, the sleeve protruding from the proximal face; and a hollow conical-shaped member attached to the fibre-bundle reception portion, the hollow conical-shaped member enclosing the plurality of grouped fibers (12af, 12bf, 12cf), wherein the plurality of sub-applicators further comprises a central sub-applicator arranged to protrude to the distal end coinciding with the longitudinal axis, wherein the sleeve of the central sub-applicator which protrudes into the elongated portion or the sleeve of the central sub-applicator is an integral part of the elongated portion, and wherein the predetermined angle is greater than 90°. an elongated portion having a finger-gripping portion on the proximal end and a fibre-bundle reception portion on the distal end, the fibre-bundle reception portion having: - a plate shape having a proximal face and a distal face, the proximal and distal faces being substantially parallel to one another and enclosing a predetermined angle (β) with a longitudinal axis of the elongated portion; and - a plurality of through holes (112a, 112b, 112c) extending between the proximal face and the distal face; - a plate shape having a proximal face and a distal face, the proximal and distal faces being substantially parallel to one another and enclosing a predetermined angle (β) with a longitudinal axis of the elongated portion; and - a plurality of through holes (112a, 112b, 112c) extending between the proximal face and the distal face; a plurality of sub-applicators (12a, 12b, 12c) inserted one-by-one through a respective one of the plurality of through holes, wherein each sub-applicator respectively has: - a plurality of grouped fibers (12af, 12bf, 12cf) so as to receive the coating agent, the plurality of grouped fibers protruding from the distal face; and - a sleeve (12as, 12bs, 12cs) configured to fix the plurality of grouped fibers, the sleeve protruding from the proximal face; and - a plurality of grouped fibers (12af, 12bf, 12cf) so as to receive the coating agent, the plurality of grouped fibers protruding from the distal face; and - a sleeve (12as, 12bs, 12cs) configured to fix the plurality of grouped fibers, the sleeve protruding from the proximal face; and a hollow conical-shaped member attached to the fibre-bundle reception portion, the hollow conical-shaped member enclosing the plurality of grouped fibers (12af, 12bf, 12cf), wherein the plurality of sub-applicators further comprises a central sub-applicator arranged to protrude to the distal end coinciding with the longitudinal axis, wherein the sleeve of the central sub-applicator which protrudes into the elongated portion or the sleeve of the central sub-applicator is an integral part of the elongated portion, and wherein the predetermined angle is greater than 90°.