Compounding by hand does take longer. Using a buffer may be quicker but it does take some skill. My boat sat for 5 years, the last two were outside with just a cockpit cover. The topsides were dull and chalky. The first year I got her back out I used a meduim compound. It looked Ok but did not last the whole season. The following spring I wet sanded with 1500 grit then 2500 grit sand paper followed by a medium compound. It lasted the full season and I redid it in the fall. This spring I again used a fine compound and it lasted all season. I just started to clean her up before putting her away. I am amazed how she shines. From the rub rail and below it looks better than boats 10-15 years newer. The topside is good but does not have the glossy, wet look of a new boat. I did use a buffer this spring, but it left some swirl marks. Doing it by hand this fall gave me the best results. I am estimating that I have spent about 8 hours compounding and then waxing above the rub rail. The waxing part is much quicker; wax on, dry, the wax off. You'll spend most of your time with the buffing compound. That is were the results will be.