If you actually have something on the hull that won't come out with acetone, then I'd try some turtle wax (polishing compound) with a wheel, or perhaps even wetsanding it with a little 1000, 1500, 2000 and then rebuffing with some polishing compound.
At the end of the day wipedown though give that boatbling a try. you won't be dissapointed!
www.boatbling.net RD