A coating apparatus for coating an associated product includes a conveyor mechanism for advancing the associated product, and an indexing system configured to index the associated product as it is advanced by the conveyor mechanism. The indexing system includes a product support member coupled to the conveyor mechanism for supporting the associated product during movement through the coating apparatus. The product support member includes a rotatable spindle shaft and an indexing member rotationally interlocked with the rotatable spindle shaft. The indexing member is configured to engage a guide surface of an adjacent first guide member as the product support member is advanced by the conveyor mechanism past the guide member to change an orientation of the rotatable spindle shaft. A locking mechanism is also included for locking rotation of the rotatable spindle.