I wanted to bring some vibrancy back to the finish of the hull of my recently-purchased Coronado 15. As I received it, the hull was somewhat chalky. I tried a few different automotive cleaning waxes that I had around, then did some internet research and found 3M Heavy Cutting Compound.
I used wool wheels from and a Harbor Freight adjustable polisher.
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It may not be back to showroom shine, but it was a big improvement over the initial condition.