[leddzepp]

Lye will strip everything off and give you a raw base to polish. You cannot polish a discolored grille due to the anodization. Do not leave lye (drain cleaner, oven cleaner) on it too long or you will ruin it. If you do not want the upkeep associated with aluminum it will either need to be re-anodized or parked in a garage, otherwise it oxidizes quickly and will need frequent polishing. I had my grille restored and did not re anodize. It is garage kept and I have only polished it once since then.