A system paints the external and internal faces of a splayed end of a hollow shaft, with a rotary paint bench. This splayed end includes an end support face and an opposite support face. The system includes a fixing ring applied against the end support face and a counter-ring applied against the opposite support face as well as a fixing device, an end hub fixed to the fixing ring in line with the splayed end, and including a running belt suitable for resting on two rollers of the bench, a hollow external hub including two half-hubs delimiting a running belt suitable for resting on two rollers of the bench, and fixed to the counter-ring while surrounding the splayed end.