First try buffing the micarta. I have 2 buffing wheels which i stick in my drill press, one with green rouge and the other with white wchich is a finer compound. Hang on to your knife with a death grip, and wear a respirator or get one of them dentist liek masks at a hardware store (buffing compound isn't very good for you.)
If the scratches are still there, some 400 grit paper and water has always worked for me. Sand until scratches are gone and then buff.
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"Come What May..."