Abstract: The method according to the invention to apply resin (1) over the edge (3) of a machined part in order to protect the handling operator from possible injuries caused by said edge (3) , is characterized in that:—said resin (1) is prepared to be made fluid and usable by a coating device applied over said edge (3) ,—said edge (3) is coated with resin by means of said coating device being applied in translation along the edge (3) so as to apply a regular strip of resin on said edge (3) , on its front and sides, and—said applied strip of resin is cured so that it hardens and adheres to said edge (3) and strongly covers its machining imperfections so that the part can be caught by hand safely.