. . . and if you were repairing or painting the scaffolding itself you would also be performing (or doing) work on the scaffolding.First of all, I think you mean scaffolding. The only work performed on scaffolds is very bloody (executions).
If you have a scaffolding alongside a building, and are working on the wall next to it, then the work is performed from the scaffolding.
If you have a scaffolding set up in a large space, and are putting a fresco on the ceiling on the ceiling for example, the painting is performed from the scaffolding, but the mixing of the colors would be done on the scaffolding.
The word scaffold is used in the building trade as in 'RES Teesdale offer contract scaffold services, hire of access and building equipment and a scaffold appreciation course.' I doubt if the users of the scaffolds you have in mind would have greatly appreciated it.First of all, I think you mean scaffolding. The only work performed on scaffolds is very bloody (executions).
The hangman's platform is the second definition.a temporary or movable platform for workers (as bricklayers, painters, or miners) to stand or sit on when working at a height above the floor or ground