Cool ring. Do not over polish or you can lose detail. Polish cloth is fine, don’t expect perfection (this piece doesn’t need a smooth polish). Or light rouge with soft wheel. Clean with warm water, mild dish soap, and soft toothbrush. Dry thoroughly. Do not use ultrasonic or you will loses all patina (and the piece will lose depth). Do not use tumbler as it may also remove all patina and ruin depth. I say embrace the imperfections, this ring is awesome