Never tried dyeing micarta, i've made some beautiful scales with it, but it's always been the case for me that the fiberglass resin bleaches a lot of color out of the material, wonder if you can add dye to the resin mix to keep a deeper color?
Not a Buck, sorry, but here's an example, I used denim for the micarta, it was older black denim that had faded somewhat to a nice charcoal gray color, but after the resin bleached it, this is how it turned out, not bad looking at all but not the deeper color I wanted: