Micarta is about all I have on my fixed blades, and love the inlays on my sebenza's. Tough, lightweight, and good grip when wet or bloody.
On my micarta sebbies I use a q-tip sprayed with a gun degreaser. Dish soap also has a degreaser and works well.
I like to keep oil out/off of my micarta, so I never put mineral oil on them, and clean my hand oils from the micarta often.