A method for removing a portion of a coating disposed on a plate, in which a nozzle having a wide jet is first utilized to remove most of the material of the portion to be removed. Successively or concurrently therewith, at least one fine jet nozzle is utilized to cut the contour of the portion of the coating being removed. The method is particularly advantageous for removing deposits of a plasma deposition, and more particularly for deposits which resist a diffusion welding or soldering of plates or substrates with one another.