A process for continuously coating a flat strip material (2) with a paste-like plastics layer (3) applied in specific areas and a second scattered layer of powder and then subjecting to a thermal treatment. Prior to the thermal treatment the deposited powder is fluidised by an air jet (L) inclined towards the strip surface (6) and simultaneously sucked up by vacuum (S) directly above the strip. Also claimed is plant (1) for the above method, including a coating unit (12) for applying the first layer, a powder scattering unit (13), a conveyer (11) moving the flat strip through the coating and scattering units and a powder blower (9) and suction unit (10) between the powder scattering unit and the thermal treatment chamber (16).