Abstract: A batch of parts to be painted is put into each of a plurality of barrels rotatably mounted on an indexing turntable in angularly spaced relation therearound. A spray gun, a hot-air blower, and a cool-air blower are disposed in angularly spaced positions around the turntable respectively for spraying paint onto, heating, and cooling the parts in the barrels while the turntable is held at temporary rest between its intermittent angular movements. The sequence of the steps is repeated until the paint coating on the parts has a desired thickness thereon. A parts separator may be provided for separating the parts from each other to avoid possible paint adhesion therebetween.