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A portable air compressor is a useful tool for airbrushing projects, especially those on a model train layout. Watch as Model Railroader associate editor Cody Grivno shows you how to connect your airbrush to an air compressor and describes the fittings needed. Cody will also show you some of the latest N, HO, O, and large scale model railroad products received at the Model Railroader offices. As in every episode, Cody answers your viewer mail, so keep those question and comments coming.