What final grit would give the best shine to a Charlevoix coral: micro alumina or aluminum oxide or cerium oxide? This is my first hand polish (for my doctor, crazy me) which is up to 800 grit so far.
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Depends on the prior steps. If it is ready for the polishing stage then cerium oxide is best. We'd recommend ZAM buffing compound as a final or prior stage to cerium as well.