A novel metallic squeeze-out tube suitable for packing paste-like foods whose flavor is regarded as important or the like is described herein, in which a resin powder layer is formed on its inner surface and on the outer surface of its neck portion by electrostatic painting and thereafter it is finished by baking, whereby a resin coating film that is free from pin holes and has a strong corrosion resistance can be formed. Also a novel apparatus for forming a resin powder layer for such metallic squeeze-out tube is described, in which a cylindrical high voltage electrode is disposed in the proximity of an outer surface of a neck portion of an unprocessed metallic squeeze-out tube, a rod-shaped electrode to be inserted concentrically to the interior of the neck portion is provided if the inner diameter of the neck portion is large, a cylindrical high voltage electrode that is vertically movable and adapted to eject resin powder is disposed in the interior of the body portion of the squeeze-out tube, and further, air flows at the various portions in the metallic squeeze-out tube are adjusted so as to continuously form a powder layer.