Abstract: The present invention relates to a painting line for metal objects, such as coating screws and nails, comprising a base for affixing said objects (2) at a space from one another on said base, members (5) for spreading paint on the objects (2) affixed to the base and, if needed, heating elements (6) for fixing the paint on the objects prior to freeing of the base. The base is a magnetic conveyor (1), provided thereunder a feeder (7) known in itself in the art for arranging objects to form at least one individual row to be in contact with the undersurface of the magnetic conveyor (1) so that said conveyor picks one object (2) at a time from each row. The paint spreading members 5 are likewise positioned under the magnetic conveyor (1) after the feeder (7) and separated from the magnetic conveyor by means of a thin sheet (8) disposed thereagainst, against the undersurface of which the objects (2) glide due to the action of the magnet conveyor (1) gliding against the opposite side of said sheet.