Arrangement (1) for treating a surface with a jet comprising a multiplicity of particles, the arrangement (1) at least comprising: a mixing chamber (2) for mixing a stream of propellant gas with the multiplicity of particles, a particle generator (8), which is designed to generate the multiplicity of particles and introduce them into the mixing chamber (2) in a solid state, the particle generator (8) having at least one screen plate (10), and it being possible for the multiplicity of particles to be formed in a solid state by pressing a solid starting material (12) through the screen plate (10),a propellant gas line (3) with a propellant gas nozzle (4) for introducing the propellant gas into the mixing chamber (2), and an outlet (7) from the mixing chamber (2) for the stream of propellant gas. With the arrangement presented and the process presented for treating a surface, a particularly uniform and particularly intensive treatment of the surface can be achieved. In this case, it is possible to use particularly large carbon dioxide particles having high kinetic energy, which have a particularly uniform and particularly well-controllable particle size. This applies in particular to cleaning and removing flash or burr. The arrangement and the process may be used in particular in the production of wire or plastic products.