Here is a Michigan PJ-18 I polished up. It was really crusty and pretty beat up when I got the prop. I sanded with my orbital palm sander and 120 grit, hand sanded with 220 grit, and hand polished with White Diamond. It will get dull after running it a bit, and you do have to keep up on it to keep it shiny. It does look nice when it’s polished though.
-Ben
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