At Custom Home Specialists, Inc. in Belton, SC, we do use our flow-coater prefinish paint machine to flood the fiber cement board. This process floods the board with a special stain formulated for fiber cement. The stain settles in the grooves of the panel to give the appearance of real wood. Feel free to contact us. We've done numerous jobs with this type of request and would be happy to provide samples run through our machine. I'm attaching a couple of pictures.
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Love the darker vertical section, and both grays.
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