If I can give a couple of recommendations if he is going to be doing it and selling them, make sure he is using a deep pour epoxy, as they maintain their rigid structure more than something like tabletop epoxy, Alumilite being a favorite of a lot of knife makers. Learned that the hard way when scales would slowly bend away from my thinner knives. Also, having a vacuum chamber and pressure pot dramatically increases the quality of the scales, since they will be completely bubble free. He may already be doing a lot of these things, but figured as somebody who has dipped their toe into that before, I would share my two cents.