An installation for immersion treating objects, in particular vehicle bodies, having a) at least one immersion tank, which can be filled to a certain level with a treatment fluid; b) a transport system, which moves the objects towards the immersion tank and away from this; c) at least one stationary rotary station (5, 6), which is provided on the immersion tank and has a rotary platform on which at least one object can be fastened in each case and which can be rotated from a first position, in which the object is located above the level of the treatment fluid, into a second position, in which the object is located below the level of the treatment fluid, and/or in the opposite direction between these two positions; wherein d) each object can be fastened to a skid of the installation, which cooperates with the transport system and can be fixed on the rotary platform of the rotary station (5, 6), wherein the skid has a base structure and a fastening device for the object; characterised in that e) the fastening device has ea) a holding structure for the object; eb) at least two guide elements, which are fastened to the base structure of the skid and extend away from this in the direction of the holding structure or are fastened to the holding structure and extend away from this in the direction of the base structure and each have a slot; ec) at least two guide pins, which are fastened to the holding structure or the base structure and each engage in displaceable manner in a slot of a guide element. a) at least one immersion tank, which can be filled to a certain level with a treatment fluid; b) a transport system, which moves the objects towards the immersion tank and away from this; c) at least one stationary rotary station (5, 6), which is provided on the immersion tank and has a rotary platform on which at least one object can be fastened in each case and which can be rotated from a first position, in which the object is located above the level of the treatment fluid, into a second position, in which the object is located below the level of the treatment fluid, and/or in the opposite direction between these two positions; d) each object can be fastened to a skid of the installation, which cooperates with the transport system and can be fixed on the rotary platform of the rotary station (5, 6), wherein the skid has a base structure and a fastening device for the object; e) the fastening device has ea) a holding structure for the object; eb) at least two guide elements, which are fastened to the base structure of the skid and extend away from this in the direction of the holding structure or are fastened to the holding structure and extend away from this in the direction of the base structure and each have a slot; ec) at least two guide pins, which are fastened to the holding structure or the base structure and each engage in displaceable manner in a slot of a guide element. ea) a holding structure for the object; eb) at least two guide elements, which are fastened to the base structure of the skid and extend away from this in the direction of the holding structure or are fastened to the holding structure and extend away from this in the direction of the base structure and each have a slot; ec) at least two guide pins, which are fastened to the holding structure or the base structure and each engage in displaceable manner in a slot of a guide element.