A portable sputtering apparatus for repairing the damaged surface on aircrafts comprises: a cylindrical chamber, having a top chamber plate and a bottom chamber plate. The cylindrical chamber comprises a welded flange for attachment to a high vacuum system and a first tube and flange assembly for attachment to an inert gas bottle. The top chamber plate comprises a cathode housing, comprising a cathode coated with the material to be sputtered onto the surface of the aircraft, and a second tube and flange assembly for discharge of pressure within the chamber. The bottom chamber plate comprises a second housing that attaches to the surface of an aircraft. Within the second housing is a metal sheet, having an aperture that allows sputtered material to flow onto the surface of the aircraft. The material to be sputtered may be carbon composite or copper.