[Benjamaphone]

I don't think that anodizing would be a very practical solution. We use a few shops for our anodizing but the abosolute max length that they can dip is 20'. I would imagine that there must be a way to anodize 60' of alum but I think that cost would quickley outweigh the time that HAWK180's method would require. However, I would say that we don't recommend painting our Almag castings because anodizing has a much higher tolerance for marine stresses. As Alan said, anodizing essentially "pre-oxidizes" the alum, preventing any further oxidizing.