A process for coating a substrate is provided which includes the following steps:

    • (a) applying a waterborne base coat composition to a surface of the substrate;
    • (b) applying infrared radiation at a power density of 1.5-30.0 kW/m2 and a first air stream simultaneously to the base coat composition such that a pre-dried base coat is formed upon the surface of the substrate; and
    • (c) applying a second air stream in the absence of infrared radiation to the base coat composition such that a dried base coat is formed upon the surface of the substrate.
  • Various embodiments of the invention are disclosed including continuous, batch, and semi-batch processes, which may include additional process steps, such as subsequent application of a topcoat. The process may be used to coat a variety of metal and polymeric substrates, for example, those associated with the body of a motor vehicle.

     
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