Often with polished micarta, roughing it s unnecessary. Try rinsing it with rubbing alcohol first. I've found that usually removes all of the buffing compound are reveals the micarta grain.
Actually, just put it in your pocket. The rest will take care of itself. I have one of those Lumberjacks with micarta grips. They were smooth at first but have got a nice grippy surface after just a bit of pocket time.
I have been meaning to buy an opi and try it out. Could throw it in my tool bag, along with a sharpening stone. I know I would use it or loan it at some point good call stitch.