http://www.ebay.com/itm/Duralux-Camouflage-Paint-Dead-Grass-Green-Gallon-/260707098298QUOTED:
"Aluminum: Pretreat with suitable wash primer. Apply one coat of Duralux Zinc Chromate M739, Top with two full coats of Duralux Camo Paint."
Like i said i didnt apply anything but the Aluma-Brite to the bare aluminum. From what i was told by someone who frequently paints aluminum the Aluma-Brite is an acid that "opens" up the pores of the aluminum allowing the paint to bite.