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I have built a new aluminum tank from 5052-H32 marine grade aluminum for my boat ( we are metal fabricators), and was thinking about taking it to a shop that does the spray on bedliners. It is supposed to be impervious to anything, and not harmful to aluminum. Anyone have any experience with this, have you tried it? Previously I have always painted with zinc chromate several coats to protect the aluminum like is done on aircraft parts.