Chris, micarta is easy to work with. If you are using a belt grinder/sander, use fairly fresh belts. A used belt, too fast, will burn it.
Get fairly close to where you want it, then finish by hand. Use files to shape. Then sanding cloth strips to round and blend everything. Work to finer sandpaper until you are happy with it.
Then, buff it if you are looking for gloss, using ordinary buffing compound.
If you want to leave it matte after sanding, then go over it with boiled linseed oil to bring out the color after sanding, but still leave it matte.
Dan