That's not how carbon fiber scales are made. While the layup process (as with fiberglass) is used for things like car parts or high-end bicycles, where the weave and alignment of fibers is selected for particular properties like load-bearing strength, carbon can also be machined like any other solid material. Instead of doing a complex layup like a car fender, the raw carbon sheets are stacked in a rectangular mold to create large sheets of various thicknesses which are then cut into blocks. You'll find 1/4", 3/16", 1/2", and 1" thicknesses from most knife supply vendors.
The issue of voids, whether the part is an engineered layup or a sheet to be cut down into smaller blocks, comes during the curing process. Carbon fiber is cured under vacuum, which compresses the material by removing all of the air from within the epoxy/fiber matrix. If a bubble of air doesn't get removed, you have a void. Depending on what happens to the part after curing, you may never know there's a void; it's only when the void ends up on the external surface of the finished part that you really know it's there. As others have mentioned, shred or marble carbon fiber, where the fibers are chopped up into short strands and not woven in any particular pattern, are more prone to voids than the more uniform twill weave versions.
Carbon needs to be machined relatively slowly, and with sharp implements. If a machining tool is getting dull, it's more likely to cause chipping.