The portion of the hull in contact with the water has now finished its initial deoxidation as previously described. The upper portion of the outside hull will be left clean but oxidized. There is a marked difference between the two. Oxidation allows paint to adhere to the metal better than polished aluminum; polished aluminum offers less resistance to water when it is stripped. The boat will remain here, strapped down, until it is warm enough to paint it outdoor some time this spring.