Use a machine. Save the "hand-rubbed" finish for woodwork. A polisher makes quicker work using less material and does a better job of removing compound and wax. And it's in the removing that these products achieve the fine finish. I use a rotary polisher, which is quicker, spatters less and doesn't "kick" when working around transom rings, rub rails, vent fittings and other obstructions. But if you're inexperienced, I suggest a random orbit polisher, like Shurhold's Dual Action model, which is more forgiving and doesn't allow you to goof and create swirl marks.