Just bought a 2006 Smokercraft Pro Mag 161. The aluminum hull has a few scrapes and scuffs from rubbing docks etc. Some are small with a few being about 2" X 2" or so. Haven't been able to find many sources of advice for just touching up these spots - most sources are about doing the whole hull. Any advice for me -don't need to do a perfect job- just looking to make it look better than it does with the scrapes....Thanks!!